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 540 CMR 4.00:ANNUAL SAFETY AND COMBINED SAFETY AND EMISSIONS INSPECTION OF ALL 

MOTOR VEHICLES, TRAILERS, SEMI-TRAILERS AND CONVERTER DOLLIES 

540 CMR 4.01. Scope and Applicability 

540 CMR 4.02. Special Definitions 

540 CMR 4.03. Requirements for Initial and Subsequent Staggered Annual Inspection 

540 CMR 4.04 Procedures for Inspections of Non-Commercial Motor Vehicles 

540 CMR 4.05. Procedures for Inspections of Commercial Motor Vehicles 

540 CMR 4.06. Procedures for Inspection of Motorcycles 

540 CMR 4.07. Issuance of Certificates of Inspection, Rejection, and Waiver Procedure 

540 CMR 4.08. Licensure of Inspection Stations 

540 CMR 4.09 . Licensure of Inspectors 

 

4.01: Scope and Applicability 

 540 CMR 4.00 is adopted by the Registrar of Motor Vehicles pursuant to the authority of M.G.L. c. 

90, § 31. 540 CMR 4.00 establishes Rules and Regulations for the Safety and Combined Safety and 

Emissions Inspections of all motor vehicles registered in the Commonwealth of Massachusetts under the 

authority of M.G.L. c. 90, § 7A. 540 CMR 4.00 also establishes regulations for the issuance of various 

inspection certificates pursuant to M.G.L. c. 90, § 7V, (a)(b)(c), and Regulations for the licensing of 

stations and inspectors pursuant to M.G.L. c. 90, § 7W. The failure of a motor vehicle to meet the 

requirements of the Safety and Combined Safety and Emissions Inspections will result in the suspension 

of the vehicle's certificate of registration pursuant of M.G.L. c. 90, § 20. 

4.02: Special Definitions 

In addition to the definitions set forth in M.G.L. c 90, § 1. the following special definitions shall also 

apply: 

Antique Motor Car shall mean any motor vehicle which has been assigned an antique registration plate. 

ALARS shall mean the Automated Licensing and Registration Systems used by the Registry of Motor 

Vehicles. 

Certificate of Inspection shall mean a serially numbered, adhesive sticker, device, document or symbol, 

as may be prescribed by the Registrar, indicating a motor vehicle or motorcycle has met the inspection 

requirements established by the Registrar. The Registrar may prescribe the use of one or more categories 

of said Certificates. 

Certificate of Rejection shall mean a serially numbered, adhesive sticker, device, document or symbol, 

as may be prescribed by the Registrar, indicating a motor vehicle or motorcycle has failed to meet the 

Safety and Combined Safety and Emissions Inspection requirements. 

Certificate of Waiver shall mean a serially numbered device or symbol, as may be prescribed by the 

Registrar, indicating that the requirement of passing the Emissions portion of the Combined Safety and 

Emissions Inspection has been waived for a vehicle pursuant to 540 CMR 4.00. 
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 Class A License shall mean the license issued to a Public or Fleet inspection station conducting noncommercial light duty gas and diesel inspections of vehicles 10,000 lbs (GVWR) or less. 

Class B License shall mean the license issued to a Public or Fleet inspection station conducting 

commercial and non-commercial light and medium duty gas and diesel inspections of vehicles 26,000 

lbs. (GVWR) or less including light-duty pole or pull trailers only. 

Class C License shall mean the license issued to a Public or Fleet inspection station conducting all 

commercial medium and heavy duty inspections of vehicles over 10,000 lbs. (GVWR) including all 

trailers, semi-trailers and converter dollies. 

Class D License shall mean the license issued to a Public or Fleet inspection station conducting all 

commercial and non-commercial light, medium and heavy duty inspections of all vehicles including all 

trailers, semi-trailers and converter dollies. 

Class E License shall mean the license issued to a Public or Fleet inspection station conducting heavy 

duty commercial inspection of vehicles over 26,000 lbs. (GVWR) including all trailers, semi-trailers and 

converter dollies. 

Class F License shall mean the license issued to an individual or corporation performing inspections on 

commercial vehicles or school pupil transport vehicles of all fuel types and weights, including all 

trailers, semi-trailers and converter dollies, owned or leased by a fleet, using mobile equipment for the 

performance of such vehicle inspections. The performance of commercial vehicle inspections at multiple 

repair and maintenance facilities owned by the fleet shall be subject to the following conditions: 

(a) The repair facility shall consist of a building on-site with a discernible address for the purposes 

of fleet administration. Said fleet is contracting the inspection of existing commercial vehicles 

with gross vehicle weight ratings of 10,001 pounds or more, including all trailers, semi-trailers 

and converter dollies to the Class F Licensee at the same physical location. 

(b) Vehicles owned or leased by said fleet and registered as "noncommercial" motor vehicles shall 

not be eligible for inspection by Class F Licensees. 

(c) Noncommercial motor vehicles furnished for regular use by individual employees of said fleet 

shall not be eligible for inspection by Class F Licensees. 

(d) All Class F Licensees utilizing mobile equipment for the testing of such commercial vehicles, 

trailers, semi-trailers or converter dollies owned or leased by said fleet shall have on-site OBD, 

opacity or any other emissions equipped workstation capable of performing such emissions 

inspections as required by 310 CMR 60.02. 

(e) The annual number of commercially registered vehicles, trailers, semi-trailers or converter 

dollies inspected by Class F Licensees with gross vehicle weight ratings of less than 10,001 lbs 

shall not exceed the annual number of commercially registered vehicles with gross vehicle 

weight ratings of more than 10,001 lbs. (GVWR) 

Class M License shall mean the license issued to a Public or Fleet Inspection Station conducting 

motorcycle inspections. 

Commercial Motor Vehicle Inspector shall mean an individual licensed by the Registrar as properly 
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qualified under 540 CMR 4.08(1)(h). 

Commercial Motor Vehicle shall mean any motor vehicle which is not a private passenger motor 

vehicle, antique motor car, motorcycle, auto home, house trailer, taxicab, ambulance, hearse, livery 

vehicle, or school pupil transport vehicle. A commercial motor vehicle shall include the following 

vehicles: 

(a) The vehicle has a gross vehicle weight rating or gross combination weight rating of 10,001 or 

more pounds; or 

(b) The vehicle is designed to transport more than 15 passengers, including the driver; or 

(c) The vehicle is used in the transportation of hazardous materials in a quantity requiring 

placarding in accordance with the Hazardous Materials Regulations of the United States 

Department of Transportation. Any commercial motor vehicle that singularly has a gross vehicle 

weight rating of 10,001 pounds or less and is designed to meet emissions standards, shall be 

submitted for an emissions inspection in addition to all applicable safety inspection requirements; 

or 

(d) A single, full or semi-trailer, used in commerce, with a manufacturer's gross vehicle weight 

rating over 3,000 lbs; or 

(e) Any vehicle which has a vehicle weight, or curb weight, of more than six thousand pounds, as 

per the manufacturer's description of said vehicle, unless such vehicle is a sport 

utility vehicle or passenger van, or a pickup truck or cargo van meeting the definition of private 

passenger vehicle; or 

(f) Any vehicle which has five or more wheels on the ground. 

Commissioner shall mean the Commissioner of the Department of Environmental Protection for the 

Commonwealth. 

DEP shall mean Department of Environmental Protection. 

Dynamometer shall mean a device which applies a load to a vehicle's drive wheels during an emissions 

inspection while the vehicle is being operated in a stationary, secure position to simulate actual driving 

conditions. 

Exempt Vehicles From Emission Standards shall mean any motor vehicle exempted under 310 CMR 

60.02 and in accordance with M.G.L. c. 111, § 142M. 

Federal Motor Carrier Safety Regulations shall mean the most current published edition of Title 49 

U.S.C. Parts 390 to 397 including appendix G as identified by USDOT/FHWA/OMC. 

Fleet Inspection Station shall mean a business which owns or maintains a fleet of at least 15 motor 

vehicles and maintains a garage for the repair and maintenance of those vehicles and is licensed by the 

Registrar to perform the Safety or Combined Safety and Emissions Inspection on its motor vehicles or 

motor vehicles owned by other fleets that are in the same vehicle class. 

Fleet Inspection Station for Commercial Motor Vehicles shall mean an Inspection Station licensed by 

the Registrar to perform Safety or Combined Safety and Emissions Inspections on Commercial Motor 

Vehicles. 

General Registration Holder shall mean any manufacturer, dealer, repairman, owner-contractor, 
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transporter, farmer, dealer in recreational vehicles, trailers, boat trailers, or forester, all as defined in 

M.G.L. c. 90, § 1 and regulated by 540 CMR 18.00, who has been issued a general registration plate 

pursuant to M.G.L. c. 90, § 5. 

Inspection Station Agreement shall mean the contract between the Network Contractor and the 

Inspection Stations which sets forth their respective responsibilities and duties. 

Licensed Inspector shall mean an individual licensed by the Registrar in accordance with 540 CMR 4.00 

as properly trained to perform a Massachusetts Motor Vehicle Safety and/or Emissions Inspection. 

Licensee shall mean a holder of an Inspection Station License of any Class issued in accordance with 

540 CMR 4.00. 

Mobile Commercial Motor Vehicle Inspector shall mean an individual, certified and licensed, who 

meets the requirements of 540 CMR 4.00 who may inspect commercial motor vehicles or school pupil 

transport vehicles at a repair facility of any commercial motor vehicle operation that meets the minimum 

requirements for inspections prescribed for Commercial Vehicle Inspection Facilities by the Registrar. 

Network Contractor shall mean the private entity which contracts with the DEP and RMV to develop, 

manage and implement the enhanced emissions and safety inspection program on accordance with St. 

1997, c. 240. 

New Car Endorsement shall mean an endorsement to a class A, B or D license which permits class 1 

automobile dealers to inspect new vehicles under 10,000 GVWR prior to delivery to a customer in 

accordance with 310 CMR 6.02 “Initial Inspection of New Motor Vehicles” and in accordance with all 

regulations, policies and procedures promulgated by the Registrar 

Out of Service Criteria shall mean the most current "Out of Service Criteria" as prescribed in the North 

American Uniform Out-of-Service Criteria published by the Commercial Vehicle Safety 

Alliance(CVSA). 

Referee Station shall mean a location which may be designated by the Registrar to verify the accuracy of 

inspections performed by Licensed Inspection stations and to grant certificates of waiver. 

Registrar shall mean the Registrar of Motor Vehicles. 

Semi-Trailer shall mean a trailer designed and used in combination with a tractor so that some part of 

the weight of the trailer and that of its load rests upon, and is carried by, the tractor. 

Trailer shall mean any vehicle or object on wheels and having no motor power of its own, but is drawn 

by, or used in combination with, a motor vehicle. 

Turnaway Document shall mean a document created by a Workstation and provided to an operator by an 

inspection station explaining the reason(s) a particular vehicle can not be tested. 

Windshield Replacement Certificate shall mean a serially numbered adhesive sticker, device or symbol 

as prescribed by the Registrar to be used in conjunction with any legible valid Certificate of Inspection, 

irrespective of any void displayed, removed due to the replacement of a windshield and displayed on the 

newly installed windshield on the same vehicle. Such Certificate shall be issued in accordance with all 
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regulations, policies and procedures promulgated by the Registrar. 

Workstation shall mean the complete set of inspection equipment approved by the Department and 

required by the Registrar for an inspection station. 

7D Endorsement shall mean an endorsement to a class A, B or D license which permits the Licensee to 

inspect 7D (pupil transport) vehicles in accordance with M.G.L. chapter 90, section 7D, 540 CMR 21.00 

and policies and procedures promulgated by the Registrar. 

4.03: Requirements for Initial and Subsequent Annual Inspection

(1) General Provisions. Every owner or person in control of a Massachusetts registered motor vehicle 

shall submit the vehicle for inspection under the following rules: 

(a) Inspection Upon Registration. Every owner or person in control of a motor vehicle which is 

newly acquired in the Commonwealth shall submit such motor vehicle for a required inspection 

within seven days of the date on which the motor vehicle is registered to said owner in the 

Commonwealth. 

(b) Subsequent Inspection. Every owner or person in control of a Massachusetts registered motor 

vehicle shall submit the vehicle for the required inspection annually, no later than the date of 

expiration on the previously issued Certificate of Inspection or as notified in a manner prescribed by 

the registrar. Early renewals are permitted. 

(c) Validity of Certificates of Inspection. Certificates of Inspection displaying void(s) due to a 

windshield replacement, which are also displaying a duly issued Windshield Replacement 

Certificate, shall be valid until the expiration of the Certificate of Inspection or when ownership of 

the vehicle is transferred, or as notified in a manner prescribed by the Registrar, whichever occurs 

first. 

(d) General Registration Holders. Every motor vehicle owned by a General Registration holder, 

except for motor vehicles held for sale and demonstration by a dealer, shall be inspected pursuant to 

540 CMR 4.00. 

(e) Farm Tractor. Any tractor or other self propelled vehicle used exclusively for agricultural or 

farming purposes, except automobiles and trucks, the use of which is declared by the owner or 

person in control thereof to be restricted to the period from a half hour before sunrise to a half hour 

after sunset and which is operated in or upon any way during such period shall be inspected and shall 

be equipped with one stop light and with brakes as manufactured, including a stationary brake with 

ratchet and pawl. 

(f) Temporary Registration Plates. Motor vehicles bearing temporary registration plates shall be 

inspected in accordance with the 540 CMR 4.00. 

(g) Out of State Registration. Motor vehicles submitted for inspection that are registered in any 

other state or jurisdiction shall be inspected in accordance with the applicable provisions of 540 

CMR 4.00 and the policies and procedures established by the Registrar. 

(h) Inspection Upon Return to Commonwealth. A motor vehicle which is not garaged or operated 

within the Commonwealth during its assigned inspection period may be operated for 15 days after its 

return to the Commonwealth if the motor vehicle bears satisfactory proof of adequate Emissions or 

Safety and Emissions Inspection from another jurisdiction. The owner or person in control of the 

vehicle shall submit the vehicle for required inspection within said 15 days. A motor vehicle which 

is not garaged or operated within the Commonwealth during its assigned inspection period may be 

operated for 3 days after its return to the Commonwealth if the motor vehicle does not bear 

satisfactory proof of inspection from another jurisdiction. The owner or person in control of the 
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vehicle shall submit the vehicle for required inspection within said 3 days. All vehicles actively 

registered which are either not garaged or operated, within the Commonwealth or temporarily off the 

road and unable to be inspected during their assigned inspection period must notify the registrar no 

later than the date of expiration on the previously issued Certificate of Inspection in a manner 

prescribed by the registrar. 

(i) Common Carrier Motor Vehicles. The mandatory inspection requirements of 540 CMR 4.00 are 

not a substitute for any inspection which may be required by the Department of Public Utilities 

pursuant to M.G.L. c. 159A. 

4.04: Procedures for Inspection of Non-Commercial Motor Vehicles

(1) Prior to beginning inspection, a visual check of the vehicle shall be made to determine that ice 

and snow accumulation or the condition of the suspension system will not impede or interfere with 

the proper aiming of headlamps, or that any space saver temporary spare tire is mounted on any axle. 

(a) The Certificate of Registration shall be inspected and the information contained thereon, 

including license plate, vehicle description, and vehicle identification number, shall be verified 

by observation of the subject vehicle. The information contained on the Certificate of 

Registration shall also be matched with the vehicle information accessible to the workstation. 

The data appearing on the Registration Certificate, the data accessible on the Workstation, the 

data appearing on the vehicle license plate, and the vehicle identification number and description 

must match in order for the inspection to proceed. No fee shall be assessed for an inspection 

which does not proceed due to a data match failure. 

(b) A Turnaway Document must be given to the operator of any vehicle refused for inspection 

due to an incorrect vehicle identification number, registration number, or for any reason a vehicle 

is otherwise refused for inspection. 

(c) No certificate of registration need be produced for a vehicle having a general registration 

issued in accordance with the provisions of M.G.L. c. 90, § 5. Either a photocopy of the original 

certificate of registration or the original certificate of registration may be produced for all other 

motor vehicles. 

(d) A licensed inspector may refuse to conduct an inspection if the motor vehicle's registration is 

determined to be invalid. 

(2) Inspection of the Vehicle. All inspections must be performed in accordance with the applicable 

provisions of 540 CMR 4.00 and 310 CMR 60.02 by licensed inspectors in the inspection bay or 

area approved for inspections by the Registrar. 

(a) Inspectors must first collect the proper fee for the inspection. 

(b) License plate(s), shall be undamaged, securely mounted, clean and clearly visible. No 

bumper, trailer hitch or other accessory may interfere with a clear view of the license plates. The 

license plate must be mounted in the proper location on the rear of the vehicle if the vehicle has 

been issued one plate. Both license plates must be mounted in the proper location on the rear and 

front of the vehicle, if the vehicle has been issued two plates. Any decorative license plate or 

license plate replica not issued by the Registry of Motor Vehicles on which any jurisdiction 

name appears must be removed from the vehicle. 

(c) General Registration Holders, every motor vehicle in possession of a general registration 

shall be checked for the proper display of the compliance decal issued pursuant to 540 CMR 

18.03. The Vehicle Identification Number (V.I.N.) and Registration Number indicated on the 

decal shall correspond with such numbers as observed by the inspector on the vehicle inspected. 

This requirement does not apply to motor vehicles owned and displaying a dealer plate. 

(d) Upon the successful completion of the inspection and a determination by the inspector that 
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the vehicle meets all inspection requirements, the inspector shall remove the old Certificate of 

Inspection from the windshield and affix the new Certificate of Inspection and provide the 

motorist with all inspection documentation and program literature as required. 

(e) A vehicle which is determined not to meet all inspection requirements shall be issued a 

Certificate of Rejection. 

(3) Perform Emissions Testing Requirements and Procedures. 

(a) Exemptions. The following motor vehicles are exempt from emissions testing: Any vehicle 

exempted pursuant to 310 CMR 60.02(3)(b) and in accordance with M.G.L. c. 111, § 142M. 

(b) Conformance with Environmental Standards. All Emissions Inspections shall be performed 

in accordance with the applicable provisions of 310 CMR 60.02 and 540 CMR 4.00, and any 

written policies or procedures provided by the Registrar or the Commissioner. 

(4) Brakes. (Non Commercial Vehicles) 

(a) The inspector shall operate the vehicle to test the parking and service brake. The parking 

brake on all vehicles will be tested by accelerating the motor to approximately 1,200 to 1,300 

RPMs with the vehicle in the lowest forward gear against the brake in the applied position. The 

vehicle will be rejected if the parking brake will not hold. The service brakes will be tested at a 

speed of between four and eight MPH. Service brakes must be reasonably equalized so that the 

vehicle does not pull noticeably to either side when applied. A test with the brake meter shall be 

made at a speed of 15 to 25 MPH in all questionable cases. 

(b) Brakes shall be adequate to stop the vehicle from a speed of 20 MPH in not more than the 

following distances: 

Service (foot) Brake Pleasure Vehicles 30 feet 

 Trucks and Buses 40 feet 

Parking (hand) Brake All Vehicles 80 feet 

(c) Additional Requirements For Types of Brake Systems.

1. Hydraulic Brake Systems. While the vehicle is stopped, apply approximately 125 pounds 

foot-force to the brake pedal and hold for ten seconds. Reject the vehicle if the brake pedal 

height cannot be maintained or if less than 20% of the total available brake pedal travel 

remains or if the brake failure warning light on vehicles so equipped illuminates. 

2. Power Brake Systems. Stop the vehicle engine and depress the brake pedal several times to 

eliminate all vacuum in the system. Depress pedal with a light force, approximately 25 pounds 

foot-force and while maintaining this force on pedal, start the vehicle engine and observe if 

pedal moves slightly with engine running. The vehicle will be rejected if the pedal does not 

move slightly as the engine is started while pressure on the brake pedal is maintained. During 

the inspection of the vehicle, the condition of visible hydraulic components should be checked. 

The vehicle shall be rejected if evidence of fluid leaks or chafing, cracking, swelling, 

restriction or other damage exists on hydraulic tubing or hoses or if they are not securely 

fastened or improperly retained. 

(5) Muffler and Exhaust System. Accelerate motor to test for prevention of unnecessary noise and 

emission of any unreasonable amount of smoke. The exhaust system, exhaust manifold(s), exhaust 

pipe(s), muffler(s), and tailpipe(s), if designed to be so equipped, shall be tight and free of leaks. 

System components shall be securely fastened with fasteners in place and undamaged. All motor 

vehicle exhaust systems shall discharge the exhaust beyond operator, passenger, and/or trunk 
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compartment. Unnecessary noise is herein defined as any noise which is louder than that emitted by 

the vehicle when equipped with the original manufacturer's equipment. A gas or diesel vehicle will 

be rejected if, at normal operating temperature, when at idle or any constant speed, visible black or 

blue exhaust emissions are evident. 

(6) Steering and Suspension. 

(a) Check for free steering by turning the steering wheel through a full right and left turn. 

Reject a vehicle if binding or interference occurs during the procedure. With the front wheels in 

the straight ahead position (and the engine running on vehicles equipped with power steering) 

measure lash or lost movement at the steering wheel rim. 

(b) Lash or lost movement on passenger cars and station wagons, as measured at the steering 

wheel rim, should not exceed two inches if the vehicle is equipped with manual steering. Lash or 

lost movement on antique motor vehicles will be measured by steering wheel diameter in 

accordance with the following schedule: 

Steering Wheel Diameter Lash (shall not exceed) 

16" 2" 

18" 2 1/4" 

20" 2 1/2" 

22" 2 3/4" 

Antique Motor Vehicles Over 1/8 turn 

(c) The front end (each side) of all vehicles will be raised by jacking and visually examined. 

Vehicles equipped with ball joints will be raised and checked in accordance with the applicable 

manufacturer’s specifications. 

(d) Reject a vehicle with excessive wear or play in any part of the steering mechanism or of 

the vehicle that would affect proper steering. 

(e) Reject a vehicle with broken, bent or missing shock absorbers or suspension springs. 

(7) Horn. Sound horn to test for adequate signal. The horn must be securely fastened to the vehicle. 

 

(8) Glazing, Mirrors and Windshield Wiper(s). 

(a) All glazing originally equipped on the vehicle must be in place. 

(b) Windshield Critical Viewing Area is the area covered by the sweep of the wiper(s) 

exclusive of the outer two inches within the perimeter of the wiper(s) sweep, provided by the 

vehicle manufacturer. 

(c) Windshields having any of the following defects will be rejected: 

1. Any broken glass with sharp or jagged edges inside or outside. 

2. Any stone bruise, star break, or bulls eye, damage in excess of one inch in diameter 

3. Single line cracks which extend more than three inches into the critical viewing area. 

4. Multiple cracks, having one or more which extends into the critical viewing area. 

5. Wiper scrape(s) in excess of 1/4 inch wide within the critical viewing area. 

6. Clouding extending more than three inches within the perimeter of the exposed glass. 

7. No poster, sticker decal or any other item shall be attached to the windshield in such a 

manner so as to obstruct the vision of the operator. 

8. Any tinting or reflective material applied by brush, spray, or adhesive which is below 

the uppermost six inches of the windshield or which may encroach upon the drivers direct 

forward viewing area. (All such tinting provided by the original manufacturer in 

compliance with applicable Federal Motor Vehicle Safety Standards is acceptable.) 
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(d) Rear Windows. Rear windows, if originally equipped, must allow an unobstructed view 

to the rear, unless the vehicle is equipped with two outside rear view mirrors. 

(e) Windshield Wiper(s). Test for proper operation. Windshield wipers must work as 

originally designed. If the vehicle was equipped with two wipers, as furnished by the 

manufacturer, both must be maintained in good working order. Wiper blades must properly contact 

the windshield and, be of the same length as those furnished as original equipment. The rubber 

elements shall be free from damage or tears. 

(f) Windshield Cleaner. If the vehicle was equipped with windshield cleaner equipment as 

furnished by the manufacturer, units must be maintained in good working order. 

(g) Window Tinting. Aftermarket tinting or alterations that do not change the transparency 

beyond that of the standards set forth in 49 CFR Part 571.205 is acceptable on windows 

immediately adjacent to the operator and front passenger seat, the windows immediately to the rear 

of the operator and front passenger seat and the rear window. If the rear window has any 

aftermarket tinting or alterations, the vehicle must be equipped with two outside rear view mirrors. 

The windshield may only be tinted down to the AS-1 line usually located in the uppermost six 

inches of the windshield. 540 CMR 4.04(8)(g) shall not apply to the following: 

1. All window tinting as provided by the original manufacturer that is in compliance with 

applicable Federal Motor Vehicle Safety Standards. 

2. Authorized vehicles used to transport K-9 teams. 

3. Vehicles registered out of state. 

4. Vehicles for which a medical exemption has been issued by the Registry of Motor Vehicles. 

5. All windows to the rear of the operator's seat on vehicles used for public livery, except taxicabs. 

6. Any vehicle registered to the federal, state or local law enforcement agencies. 

7. Vehicles registered to watch guard or patrol agencies licensed under the provisions of section 20 

of Chapter 147 or section 63 of Chapter 122. 

(9) Rear View Mirrors. Each motor vehicle shall be equipped with at least one mirror so placed and 

adjusted as to afford the operator a clear, reflected view of the highway to the rear and left side of 

the motor vehicle. All mirrors as furnished by the manufacturer must be in place and maintained in 

good working order. Check mirror(s) and reject if: 

(a) Mirror is cracked, broken, tarnished or reflective surface is peeled. 

(b) Mirror will not hold adjustment or is not mounted securely to prevent excessive vibration. 

The mirror contains sharp edges, projections or irregular indents capable of producing injury. 

(10) Lighting Devices. 

(a) Tail Lights. Every motor vehicle, except a two wheeled motorcycle, an antique motor car, and 

a farm tractor, shall be equipped with two red lights (tail lamps) mounted one at each side of the 

rear of the vehicle so as to show two red lights from behind and equipped with two stop lights 

(stop lamps) mounted and displayed in a like manner. A single lamp may combine both of the 

above functions. Every motor vehicle shall be equipped with a white light so arranged as to 

illuminate the rear number plate so that it is plainly visible at 60 feet. 

(b) Directional. Front and rear directional signals will be operable on every vehicle originally 

equipped with such signals. Every motor vehicle registered in the Commonwealth, which was 

manufactured for the model year 1967 and for subsequent model years, shall be equipped with a 

device to permit the front and rear directional signals to flash simultaneously. 

(c) Headlamps. Headlamp aim shall be checked in accordance with the specifications as most 

recently provided by the Registrar. 

(d) Lighting Devices and Reflectors. All lighting devices and reflectors required by applicable 

Federal Motor Vehicle Safety Standards or part 393 of Federal Motor Carrier Safety Regulations 
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for all motor vehicles when the particular vehicle was originally manufactured and such devices 

required by Massachusetts General Law or Rules and Regulations applicable to the particular 

vehicle inspected shall be securely attached to the vehicle and capable of performing their design 

functions. Lenses must be intact, clean, unobstructed, and free from cracks. The use of adhesive 

tape to repair lenses is prohibited. 

(e) Aftermarket Lighting. Any aftermarket lighting inconsistent with FMVSS 108 or M.G.L c 90 

shall be removed or the vehicle shall be rejected. 
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(11) Tires. 

(a) A certificate of rejection shall be issued to any vehicle submitted for inspection with a 

 tire mounted which exhibits any of the following conditions: 

1. Fabric break or cut in excess of one inch; bump or knot evidencing deterioration of the tire 

structure; or any ply or cord structure visible. 

2. For tires without tread wear indicators: Measurement taken with tread depth gauge reveals 

that 2/32 inch or less of tread depth is present in any re-cut, re-grooved, sized or original tread 

groove. 

3. For tires with tread depth indicators: Tire is worn so that any tread wear indicator contacts 

the road. 

4. Studded tires between May 1 and November 1 unless approved by the Registrar. 

5. Restricted markings indicating usage limited to any condition other than permanent highway 

use. 

6. Radial ply tire(s) on the same axle with non radial tire(s); Radial tire(s) on the front axle 

with non-radial tire(s) on the rear axle (Exception: Vehicles equipped with dual rear wheels 

may have radial and non radial tires on any axle provided they are not intermixed on the same 

axle). 

 7. Tire size shall be the same on each side of the front and/or rear axle. Tire size may be 

different between front and rear axles as determined by vehicle manufacturer. 

(b) Wheels, Wheel Bolts, Nuts or Lugs. A certificate of rejection shall be issued to any 

 vehicle submitted for inspection which exhibits any of the following conditions: 

1. Any part of any mounted wheel is bent, cracked, rewelded, damaged or has elongated bolt 

holes which may affect safe operation of the vehicle. 

2. Wheel bolts, nuts, studs or lugs are loose, missing, damaged or are not compatible for use 

with wheel design. 

(12) Bumpers, Fenders, External Sheet Metal and Fuel Tank. A Certificate of Rejection shall 

be issued if any of the following conditions are evident: 

(a) Bumpers. Broken or bent bumpers, fenders, exterior sheet metal or moldings, having sharp 

edges or abnormal protrusions extending beyond normal vehicle extremities so as to constitute a 

danger to pedestrians and other motor vehicle traffic. If bumper face plates are removed, bumper 

brackets must also be removed. On vehicles equipped with air bags bumpers may not be removed. 

The vehicle hood, door(s), luggage compartment lid, and battery or engine compartment doors or 

lids, if so equipped, must operate as originally designed. 

(b) Fenders. Front and rear fenders must be in place on all vehicles manufactured after model year 

1949 if such vehicles were designed and manufactured to be operated with front and rear fenders. 

Every passenger motor vehicle under 10,000 lbs. (GVWR) , except four wheel drive vehicles 

which are equipped with tires which extend beyond the fenders or body of such vehicle shall be 

equipped with flaps or suitable guards to reduce such spray or splash to the rear and side. 

(c) Floor Pans. Holes or cracks, due to rust or otherwise, in the floor pans or other body panels 

which would permit the passage of exhaust gases into the passenger or trunk compartments. 

(d) Fuel Tanks. Fuel tanks and all fuel system components including fuel caps which are not 

securely attached to the vehicles body or chassis, or that are leaking. 

(e) Frame or Unibody. Broken, cracked, modified or rusted structural parts of the undercarriage or 

unibody so as to cause a hazard or structural weakness. 
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 (13) Altered Vehicle Heights. The original manufacturers specified height of motor vehicles with 

an original manufacturers gross vehicle weight rating of 10,000 pounds or less shall not be altered by 

elevating or lowering the chassis or body by more than two inches, except that four-wheel drive 

motor vehicles with a original manufacturer's gross vehicle weight rating of 10,000 pounds or less 

may be altered in accordance with the provisions of 540 CMR 6.00. The Registrar may periodically 

provide approved altered vehicle height specifications for said four-wheel drive vehicles. Any motor 

vehicle altered, modified, or changed beyond the aforementioned two inches, or the Registrar's 

approved altered height specifications, shall be rejected. 

(14) Safety Belts, Lap Belts and Shoulder Restraints. Safety belts, lap belts and shoulder 

restraints originally installed in motor vehicles manufactured after July 1, 1966 shall be inspected to 

assure that all are maintained in good order. It shall be the responsibility of the motorist that the 

safety belts are readily accessible for inspection. 

(15) Air Bags. Vehicles so equipped must comply with 49 Code of Federal Regulations, Parts 

571 through 595. Effective beginning October 1, 2008, the inspector shall check for proper operation 

of the airbag malfunction indicator lamp. If not operating as designed, or if the lamp indicates a 

malfunction in the airbag system, or if any airbag originally equipped in the vehicle is deployed or 

is missing the vehicle shall be rejected. 

(16) Fuel Tank Cap Visual Check. The vehicle shall fail the gas cap visual check if the cap is 

missing, defective, or does not properly fit the vehicle. 

4.05: Procedures for Inspection of Commercial Motor Vehicles

(1) Prior to beginning inspection, a visual check of the vehicle shall be made to determine that ice 

and snow accumulation or the condition of the suspension system will not impede or interfere with 

the proper aiming of headlamps. 

(a) The Certificate of Registration shall be inspected and the information contained thereon, 

including license plate, vehicle description, and vehicle identification number, shall be verified 

by observation of the subject vehicle. The information contained on the Certificate of 

Registration shall also be matched with the vehicle information accessible to the workstation. 

The data appearing on the Registration Certificate, the data accessible to the Workstation, the 

data appearing on the vehicle license plate, and the vehicle identification number and description 

must match in order for the inspection to proceed. No fee shall be assessed for an inspection 

which does not proceed due to a data match failure. 

(b) A Turnaway Document must be given to the operator of any vehicle refused for inspection 

due to an incorrect vehicle identification number, registration number, or for any reason a vehicle 

is otherwise refused for inspection. 

(c) No certificate of registration need be produced for any vehicle having a general registration 

issued in accordance with the provisions of M.G.L. c. 90, § 5. Either a photocopy of the original 

certificate of registration or the original certificate of registration may be produced for other 

motor vehicles. 

(d) A licensed inspector may refuse to conduct an inspection if the motor vehicle's registration is 

determined to be invalid. 

(2) Inspection of the Vehicle. All inspections must be performed in accordance with the applicable 

provisions of 540 CMR 4.00 and 310 CMR 60.02 by licensed inspectors in the inspection bay or 

area approved for inspections by the Registrar. 
Page 13

(a) Inspectors must first collect the proper fee. 

(b) License plate(s), shall be undamaged, securely mounted, clean and clearly visible. No bumper, 

trailer hitch or other accessory may interfere with a clear view of the license plates. The license 

plate must be mounted in the proper location on the rear of the vehicle if the vehicle has been 

issued one plate. Both license plates must be mounted in the proper location on the rear and front 

of the vehicle if the vehicle has been issued two plates. Any decorative license plate or license 

plate replica not issued by the Registry of Motor Vehicles on which any jurisdiction name appears 

must be removed from the vehicle. 

(c) General Registration Holders. Every motor vehicle in possession of a general registration 

holder shall be checked for the proper display of the compliance decal issued pursuant to 540 

CMR 18.03. The Vehicle Identification Number (V.I.N.) and Registration Number indicated on the 

decal shall correspond with said numbers of the vehicle inspected. This requirement does not apply 

to motor vehicles owned and registered by a dealer and displaying a dealer plate. 

(d) Upon the completion of the inspection, the inspector will remove the old Certificate of 

Inspection from the windshield, and affix the new Certificate of Inspection and provide the 

motorist with all inspection documentation and program literature as required. 

(e) A vehicle which is determined not to meet all inspection requirements shall be issued a 

Certificate of Rejection. 

(3) Perform Emissions Testing Requirements and Procedures.

 (a) The following motor vehicles are exempt from emissions testing: Any vehicle exempted 

pursuant to 310 CMR 60.02(3)(b) and in accordance with M.G.L. c. 111, § 142M. 

(4) Reflectors. Every commercial motor vehicle or trailer weighing, with its load, more than 12,000 

pounds shall be equipped with a red reflector at the rear. 

(5) Chock Blocks. Every bus having a seating capacity of more than seven passengers, every truck 

weighing, unloaded, more than 4,000 pounds and every tractor, trailer, semi-trailer or combination 

which is not equipped with positive spring loaded, air parking brakes, shall be equipped with one 

pair of adequate safety chock blocks. 

(6) Splash Guards. Every motor vehicle or trailer, except passenger motor vehicles, shall be 

equipped with suitable guards which will effectively reduce the spray or splash, to the rear, of mud, 

water, or slush, caused by the rear wheels. 

(7) Marker Light. Commercial motor vehicles and trailers, having a registered carrying capacity of 

three tons or over, shall have an amber light attached to the extreme left of the front of the vehicle, 

so attached and adjusted as to indicate the extreme left lateral extension of the vehicle or load. 

(8) Horn. Sound horn to test for adequate signal. The horn must be securely fastened to the vehicle. 

(9) Warning Devices. Every commercial motor vehicle or trailer that is required to have a backup 

warning device shall be checked for proper operation of said device. Every commercial motor 

vehicle equipped with a dump body shall be equipped with an adequate audible warning system to 

alert the operator when the dump body is in an upright and elevated position. 

(10) Bumpers. The existence of broken or bent bumpers, fenders, exterior sheet metal or moldings 

having sharp edges or abnormal protrusions extending beyond normal vehicle extremities so as to 
Page 14

constitute a danger to pedestrians and other motor vehicle traffic shall be reason for rejection. If 

bumper face plates are removed, bumper brackets must also be removed. On vehicles equipped with 

air bags the front bumper may not be removed. The vehicle hood, door(s), luggage compartment lid, 

and battery or engine compartment doors or lids, if so equipped, must be capable of being firmly 

latched. 

(11) Fenders. Front and rear fenders must be in place. Every commercial motor vehicle which is 

equipped with tires which extend beyond the fenders or body of such vehicle shall be equipped with 

flaps or suitable guards to reduce such spray or splash to the rear and side. 

(12) Seat Belts. Seat Belts shall be inspected to assure that all are maintained in good order. The 

Requirements of 49 CFR, Part 393.93 shall apply. 

(13) Air Bags. Vehicles so equipped must comply with 49 CFR, Parts 571 through 595. The 

inspector shall check for proper operation of the airbag malfunction indicator lamp. If not operating 

as designed, or if the lamp indicates a malfunction in the airbag system, or if any airbag originally 

equipped in the vehicle is deployed or is missing the vehicle shall be rejected. 

(14) Procedures for Inspecting Certain Commercial Motor Vehicles and Trailers Pursuant to Federal 

Regulation. 49 CFR Parts 390 through 397, including Appendix G to Sub-Chapter B, as appearing or 

as may be revised in the Code of Federal Regulations, as related to the inspection of Commercial 

Motor Vehicles or any activity related thereto, are hereby adopted as the Regulations of the Registry 

of Motor Vehicles. Said regulations are applicable to trucks with a gross vehicle weight rating of 

over 10,000 pounds, buses transporting more than 15 passengers including the driver or any motor 

vehicle transporting hazardous materials in a quantity requiring placarding in accordance with the 

Hazardous Material Regulations of the United States Department of Transportation, 49 CFR Parts 

171 through 180. In the event of any conflict between these regulations and any other regulations or 

law of the Commonwealth of Massachusetts, the stricter more stringent standard shall apply. A 

Certificate of Rejection shall be issued to any vehicle or trailer submitted for inspection if any of the 

following conditions exist: 

(a) Air Brake Systems. 

1. Leakage Test. Start the vehicle engine and run at fast idle until air pressure on gauge reaches 

cut-off point. Cut-off must occur at 90 pounds per square inch or more, or manufacturer 

specifications. Stop engine and observe pressure gauge. With service brakes in released 

position, if drop in pressure exceeds 2 PSI in one minute for a single vehicle or 3 PSI for a 

combination vehicle or if audible leakage is evident, the vehicle will be rejected. Start engine 

and allow system to reach maximum pressure. Stop engine and apply service brakes, at which 

time a pressure drop of 5 PSI to 15 PSI will occur and system will be stabilized. With brakes in 

applied position, if drop in pressure exceeds 3 PSI in one minute for a single vehicle, or 4 PSI 

per minute for a combination vehicle, or of audible leakage is evident, the vehicle will be 

rejected. 

2. Low Pressure Warning Device Test. Apply service brakes repeatedly until the audible and 

visual low pressure indicator comes on. Reject vehicle if indicator comes on above 70 PSI or 

below 50 PSI or if the indicator is inoperable. A gauge indicating pressure is not deemed to be 

an adequate low pressure indicator. 

3. Condition of Air Brake Components. During the inspection of the vehicle, the conditions of 

visible air brake components should be checked. The vehicle shall be rejected if tubing or 

hoses are cracked, chafed, or restricted or are insecurely fastened or improperly retained. 

(b) Brake System. 
Page 15

1. Service Brakes. 

a. All brake systems are to be inspected in accordance with the manufacturer(s) 

recommended procedures. Absence of braking action of any axle required to have brakes 

upon application of the service brakes (such as missing brakes or brake shoe(s) failing to 

move upon application of a wedge, S-cam, cam, or disc brake). 

b. Missing or broken mechanical components including shoes, lining, pads, springs, anchor 

pins, spiders, cam rollers, push rods, and air chamber mounting bolts. 

c. Loose brake components including air chamber spiders, and cam shaft support brackets. 

d. Audible air leak at brake chamber (example-ruptured diaphragm, loose chamber clamp, 

etc.). 

e. Re-adjustment limits. The maximum stroke at which brakes should be readjusted is given 

below. Any brake 1/4" or more past the re-adjustment limit or any two brakes at the 

readjustment limit on less than 1/4" beyond the re-adjustment limit shall be cause for 

rejection. Stroke shall be measured with the engine off and reservoir pressure of 80 to 90 PSI 

with brakes fully applied. 

BOLT TYPE BRAKE CHAMBER DATA 

Type Effective area (sq. in.) Outside dia. (in.) Maximum stroke at 

which brakes should be 

readjusted 

A 12 6 15/16 1 3/8 

B 24 9 3/16 1 3/4 

C 16 8 1/16 1 3/4 

D 6 5 1⁄4 1 1/4 

E 9 6 3/16 1 3/8 

F 36 11 2 1/4 

G 30 9 7/8 2 

ROTOCHAMBER DATA 

Type Effective area (sq. in.) Outside dia. (in.) Maximum stroke at 

which brakes should be 

readjusted 

9 9 4 9/32 1 1/2 

12 12 4 13/16 1 1/2 

16 16 5 13/32 2 

20 20 5 13/16 2 

24 24 6 13/32 2 

30 30 7 1/16 2 1/4 

36 36 7 5/8 2 3/4 

50 50 8 7/8 3 

CLAMP TYPE BRAKE CHAMBER DATA 

Type Effective area (sq. in.) Outside dia. (in.) Maximum stroke at 

which brakes should be 

readjusted 
Page 16

6 6 4 1⁄2 1 1/4 

9 9 5 1⁄4 1 3/8 

12 12 5 11/16 1 3/8 

16 16 6 3/8 1 3⁄4 

20 20 6 24/32 1 3⁄4 

24 24 7 7/32 1 3⁄4 

30 30 8 3/32 2 

36 36 9 2 1⁄4 

1. (Note: 2” for long stroke design)

Wedge Brake Data. Movement of the scribe mark on the lining shall not exceed 1/16 

inch. 

f. Brake linings or pads. 

i. Lining or pad is not firmly attached to the shoe; 

ii. Saturated with oil, grease, or brake fluid; or 

iii. Non-steering Axles: Lining with a thickness less than 1/4 inch at the shoe center for 

air drum brakes, 1/16 inch or less at the shoe center for hydraulic and electric drum 

brakes, and less than 1/8 inch for air disc brakes. 

iv. Steering Axles: Lining with a thickness less than 3/16 inch at the shoe center for drum 

brakes, less than 1/8 inch for air disc brakes and 1/16 inch or less for hydraulic disc and 

electric brakes. 

g. Missing brake on any axle required to have brakes. 

h. Mismatch across any power unit steering axle of: 

i. Air chamber sizes. 

ii. Slack adjuster length. 

2. Parking Brake System. No brakes on the vehicle or combination are applied upon actuation 

of the parking brake control, including driveline hand controlled parking brakes. The inspector 

shall operate the vehicle to test the parking and service brake. The parking brake on all vehicles 

shall be tested by sufficiently accelerating the motor with the vehicle in the lowest forward 

gear against the brake in the applied position. The vehicle will be rejected if the parking brake 

will not hold. The service brakes will be tested at a speed of between four and eight MPH. 

Service brakes must be reasonably equalized so that the vehicle does not pull noticeably to 

either side when applied. A test with the brake meter shall be made at a speed of 15 to 25 MPH 

in all questionable cases. Service and parking brakes shall be adequate to stop the vehicle from 

a speed of 20 MPH in not more than the following distances 

Service (foot) Brake Pleasure Vehicles 30 feet 

 Trucks and Buses 40 feet 

Parking (hand) Brake All Vehicles 80 feet 

3. Brake Drums or Rotors. 

a. With any external crack or cracks that open upon brake application (do not confuse short 

hairline heat check cracks with flexural cracks). 

b. Any portion of the drum or rotor missing or in danger of falling away. 

4. Brake Hose.

a. Hose with any damage extending through the outer reinforcement ply. (Rubber 

impregnated fabric cover is not a reinforcement ply). 

 (Thermoplastic nylon may have braid reinforcement or color difference between cover 
Page 17

and inner tube. Exposure of second color is cause for rejection.) 

b. Bulge or swelling when air pressure is applied. 

c. Any audible leaks. 

d. Two hoses improperly joined (such as a splice made by sliding the hose ends over a 

piece of tubing and clamping the hose to the tube. 

e. Air hose cracked, broken or crimped. 

5. Brake Tubing. 

a. Any audible leak. 

b. Tubing cracked, damaged by heat, broken or crimped. 

6. Low Pressure Warning Device. Low pressure warning device missing, inoperative, or does 

not operate at 55 PSI and below, or 1/2 the governor cut-out pressure, whichever is less. 

7. Tractor Protection Valve. Inoperable or missing tractor protection valve(s) on power unit. 

8. Air Compressor.

 a. Compressor drive belts in condition of impending or probable failure. 

 b. Loose compressor mounting bolts. 

 c. Cracked, broken or loose pulley. 

 d. Cracked or broken mounting brackets, braces or adapters. 

9. Electric Brakes. 

 a. Absence of braking action on any wheel required to have brakes. 

 b. Missing or inoperable breakaway braking device. 

10.Hydraulic Brakes. (Including Power Assist Over Hydraulic and Engine Drive Hydraulic 

Booster). 

 a. Master cylinder less than 1/4 full. 

 b. No pedal reserve with engine running except by pumping pedal. 

 c. Power assist unit fails to operate. 

 d. Seeping or swelling brake hose(s) under application of pressure. 

 e. Missing or inoperative check valve. 

 f. Has any visually observed leaking hydraulic fluid in the brake system. 

 g. Has hydraulic hose(s) abraded (chafed) through outer cover to fabric layer. 

 h. Fluid lines or connections leaking, restricted, crimped, cracked or broken. 

 i. Brake failure or low fluid warning light on and/or inoperative. 

11. Vacuum Systems. Any vacuum system which: 

 a. Has insufficient vacuum reserve to permit one full brake application after engine is shut 

 off. 

 b. Has vacuum hose(s) or line(s) restricted, abraded (chafed) through outer cover to cord 

 ply, crimped, cracked, broken or has collapse of vacuum hose(s) when vacuum is applied. 

 c. Lacks an operative low-vacuum warning device as required. 

(c) Coupling Devices. 

1. Fifth Wheels. 

 a. Mounting to Frame. 

 i. Any fasteners missing or ineffective. 

 ii. Any movement between mounting components. 

 iii. Any mounting angle iron cracked or broken. 

 b. Mounting Plates and Pivot Brackets. 

 i. Any fasteners missing or effective. 

 ii. Any welds or parent metal cracked. 

 iii. More than 3/8 inch horizontal movement between pivot bracket pin and bracket. 

 iv. Pivot bracket pin missing or not secured. 

 c. Sliders. 
Page 18

 i. Any latching fasteners missing or ineffective. 

 ii. Any fore or aft stop missing or not securely attached. 

 iii. Movement more than 3/8 inch between slider bracket and slider base. 

 iv. Any slider component cracked in parent metal or weld. 

 d. Lower coupler. 

 i. Horizontal movement between the upper and lower fifth wheel halves exceeds 1⁄2 

 inch. 

 ii. Operating handle not in closed or locked position. 

 iii. Kingpin not properly engaged. 

 iv. Separation between upper and lower coupler allowing light to show through from 

 side to side. 

 v. Cracks in the fifth wheel plate, excepting cracks in fifth wheel approach ramps and 

 casting shrinkage cracks in the ribs of the body of a cast fifth wheel. 

 vi. Locking mechanism parts missing, broken, or deformed to the extent the kingpin 

 is not securely held. 

2. Pintle Hooks. 

 a. Mounting to Frame. 

 i. Any missing or ineffective fasteners (a fastener is not considered missing if there is 

 an empty hole in the device but no corresponding hole in the frame or vice versa). 

 ii. Mounting surface cracks extending from point of attachment (e.g. cracks in the 

 frame at mounting bolt holes). 

 iii. Loose mounting. 

 iv. Frame cross member providing pintle hook attachment cracked. 

b. Integrity. 

i. Cracks anywhere in pintle hook assembly. 

ii. Any welded repairs to the pintle hook. 

iii. Any part of the horn section reduced by more than 20%. 

iv. Latch insecure. 

3. Drawbar/Towbar Eye. 

a. Mounting. 

 i. Any cracks in attachment welds. 

 ii. Any missing or ineffective fasteners. 

b. Integrity. 

 i. Any cracks. 

 ii. Any part of the eye reduced by more than 20%. 

4. Drawbar/Towbar Tongue. 

a. Slider (power or manual).

 i. Ineffective latching mechanism. 

 ii. Missing or ineffective stop. 

 iii. Movement of more than 1/4 inch between slider and housing. 

 iv. Any leaking, air or hydraulic cylinders, hoses, or chambers (other than slight oil 

 weeping normal with hydraulic seals). 

b. Integrity. 

 i. Any cracks. 

 ii. Movement of 1/4 inch between subframe and drawbar at point of attachment. 

5. Safety Devices. 

a. Safety devices missing. 

b. Unattached or incapable of secure attachment. 

c. Chains and Hooks. 
Page 19

 i. Worn to the extent of a measurable reduction in link cross section. 

 ii. Improper repairs including welding, wire, small bolts, rope and tape. 

d. Cable. 

 i. Kinked or broken cable strands. 

 ii. Improper clamps or clamping. 

6. Saddle-Mounts. 

a. Method of Attachment. 

 i. Any missing or ineffective fasteners. 

 ii. Loose mountings. 

 iii. Any cracks or breaks in a stress or load bearing member. 

 iv. Horizontal movement between upper and lower saddle-mount halves exceeds 1/4 

 inch. 

(d) Exhaust System

 1. Any exhaust system determined to be leaking at a point forward of or directly below the 

driver/sleeper compartment. 

2. A bus exhaust system leaking or discharging to the atmosphere: 

 a. Gasoline powered. In excess of six inches forward of the rearmost part of the bus. See 

 540 CMR 7.00 for school buses. 

 b. Other than gasoline powered. In excess of 15 inches forward of the rear most part of the 

 bus. See 540 CMR 7.00 for school buses 

 c. Other than gasoline powered forward of a door or window designed to be opened, 

 excepting emergency exits. 

3. No part of the exhaust system of any motor vehicle shall be so located as would be likely to 

result in burning, charring, or damaging the electrical wiring, the fuel supply, or any 

combustible part of the motor vehicle. 

4. The exhaust system, exhaust manifold(s), exhaust pipe(s), muffler(s), and tailpipe(s), if 

designed to be so equipped, shall be tight and free of leaks. System components shall be 

securely fastened with fasteners in place and undamaged. 

5. A gas or diesel vehicle will be rejected if, at normal operating temperature, and at any 

constant speed over 15 MPH. (approximately 1,000 to 1200 RPM's) visible black or blue 

exhaust emissions are evident. 

(e) Fuel System

1. A fuel system with a visible leak at any point. 

2. A fuel tank filler cap missing. 

3. A fuel tank not securely attached to the motor vehicle by reason of loose, broken or missing 

mounting bolts or brackets (some fuel tanks use springs or rubber bushings to permit 

movement). 

(f) Lighting Devices. All lighting devices and reflectors required by Section 393 shall be operable 

(See Part 393 in Reference Section). 

(g) Safe Loading.

1. Part(s) of vehicle or condition of loading such that the spare tire or any part of the load or 

dunnage can fall into the roadway. 

2. Protection Against Shifting Cargo. Any vehicle without a front-end structure or equivalent 

device as required. 

(h) Steering Mechanism.

1. Steering Wheel Free Play. The engine must be running on vehicles equipped with power 

steering. 

Steering Wheel Diameter Manual Steering System Power Steering System 
Page 20

 

16" 2" 4 1/2" 

18" 2 1/4" 4 3/4" 

20" 2 1/2" 5 1/4" 

22" 2 3/4" 5 3/4" 

2. Steering Column. 

a. Any absence or looseness of U-bolt(s) or positioning part(s). 

b. Worn, faulty or obviously repair welded universal joint(s). 

c. Steering wheel not properly secured. 

3. Front Axle Beam and All Steering Components Other Than Steering Column. 

a. Any crack(s) in gear box or mounting brackets. 

b. Any obvious weld or repair(s). 

4. Steering Gear Box

a. Any mounting bolts lose or missing. 

b. Any crack(s) in gear box or mounting brackets. 

5. Pitman Arm. Any looseness of the pitman arm on the steering gear output shaft. 

6. Power Steering. Auxiliary power assist cylinder loose. 

7. Ball and Socket Joints. 

a. Any movement under steering load of a stud nut. 

b. Any motion, other than rotational between any linkage member and its attachment 

point of more than 1/8 inch. 

8. Tie Rods and Drag Links. 

a. Loose clamp(s) or clamp bolt(s) on tie rods or drag links. 

b. Any looseness in any threaded joint. 

9. Nuts. Nut(s) loose or missing on tie rods, pitman arm, drag link, steering arm or tie rod arm. 

10. Steering System. Any modification or other condition that interferes with free movement of 

any steering component. 

11. King Pin. Reject vehicle if measured movement at top or bottom of tire is greater than: 

Wheel Size: 16 inches or less 1/4" (6.5mm) 

 17 to 18 inches 3/8" (9.5mm) 

 Over 18 inches 1/2" (13mm) 

KINGPIN PLAY PROCEDURE: Relative to vehicles equipped with Kingpins. 

MVMA recommended procedures as noted in 540 CMR 4.05(13(h)11. 

Be sure wheel bearing movement is eliminated by applying service brake during checking 

procedure. 

Procedure: First eliminate all wheel bearing movement by applying service brake. 

With front end lifted, as illustrated for inspecting wheel bearings, grasp the tire at the top and 

bottom and attempt to move in and out to detect looseness. A pry bar may be necessary on 

heavy wheels. 

Measure the movement at the top or bottom of the tire at the outer circumference. 

Reject vehicle if measured movement at top or bottom of tire is greater than the distances 
Page 21

described below: 

Wheel size: 

16 inches or less - 1/4" (6.5mm) 

17 to 18 inches - 3/8" (9.5mm) 

Over 18 inches - 1/2" (13mm) 

The registration of the vehicle will be suspended if thrust bearings or kingpin lock or draw 

keys are missing or if examination of the vehicle reveals that steering knuckles are excessively 

worn or cracked. Measured movement in excess of the following amounts will result in the 

suspension of the vehicle registration: 

16 inches or less - 1/2" (13.0 mm) 

17 to 18 inches - 3/4" (19.0 mm) 

Over 18 inches - 1.0" (26.0 mm) 

(i) Suspension System

 1. Any U-bolt(s), spring hanger(s), or other axle positioning part(s) cracked, broken, loose or 

missing resulting in shifting of an axle from its normal position. (After a turn, lateral axle 

displacement is normal with some suspensions. Forward or rearward operation in a straight line 

will cause the axle to return to alignment.) 

2. Spring Assembly. 

 a. Any leaves in a leaf spring assembly broken or missing. 

 b. Any broken main leaf in a leaf spring assembly, (include assembly with more than one 

 main spring). 

 c. Coil spring broken. 

 d. Rubber spring missing. 

 e. One or more leaves displaced in a manner that could result in contact with a tire, rim, 

 brake drum or frame. 

 f. Broken torsion bar spring in a torsion bar suspension. 

 g. Deflated air suspension, i.e., system failure, leak, etc. 

3. Torque, Radius, or Tracking Components. Any part of a torque, radius or tracking 

component assembly or any part used for attaching the same to the vehicle frame or axle that is 

cracked, loose, broken or missing. (Does not apply to loose bushings in torque or track rods). 

4. Shocks: Any broken, bent, missing shock absorbers or suspension springs. 

(j) Frame

1. Frame Members. 

 a. Any cracked, broken, loose, or sagging frame member. 

 b. Any loose or missing fasteners including fasteners attaching functional component 

 such as engine, transmission, steering gear, suspension, body parts, and fifth wheel. 

2. Tire and Wheel Clearance. Any condition, including loading that causes the body or frame 

to be in contact with a tire or any part of the wheel assemblies. 

3. Adjustable Axle Assemblies (Sliding Subframes). Adjustable axle assembly with locking 

pins missing or not engaged. 

(k) Tires.

1. Any tire on any steering axle of a power unit. 

 a. With less than 4/32 inch tread when measured at any point on a major tread groove. 

 b. Has body ply or belt material exposed through the tread or sidewall. 

 c. Has any tread or sidewall separation. 
Page 22

 d. Has a cut where the ply or belt material is exposed. 

 e. Is labeled "Not For Highway Use" or displaying other marking which would exclude 

 use on steering axle (except for farm vehicles, implements of husbandry, and off-road 

 equipment is used on highway at restricted speeds). 

 f. A tube-type radial tire without radial tube stem markings. These markings include a red 

 band around the tube stem, the word "radial" embossed in metal stems, or the word 

 "radial" molded in rubber stems. 

 g. Mixing bias and radial tires on the same axle 

 h. Tire flap protrudes through valve slot in rim and touches stem. 

 i. Re-grooved tires on buses, trucks and truck tractors, except for trucks and truck 

 tractors equipped with front tires with a load carrying capacity of less than that of 8.25 

 -20 8 ply-rating tires. 

 j. Boot, blowout patch or other ply repair. 

 k. Weight carried exceeds tire load limit. This includes overloading tire resulting from 

 low air pressure. 

 l. Tire is flat or has noticeable (e.g., can be heard or felt) leak. 

 m. Any bus equipped with recapped or re-treaded tire(s). 

 n. So mounted or inflated that it comes in contact with any part of the vehicle. 

 o. Tire size shall be the same on each side of the front and/or rear axle. Tire size may be 

 different between front and rear axles as determined by vehicle manufacturer. 

2. All tires other than those found on the steering axle of a power unit: 

 a. Weight carried exceeds tire load limit. This includes overloaded tire resulting from low 

 pressure. 

 b. Tire flat or has noticeable (e.g., can be heard or felt) leak. 

 c. Has body ply or belt material exposed through the tread or sidewall. 

 d. Has any tread or sidewall separation. 

 e. Has a cut where ply or belt material is exposed. 

 f. So mounted or inflated that it comes in contact with any part of the vehicle. (This 

 includes a tire that contacts its mate.) 

 g. Is labeled "Not For Highway Use" or displaying other marking which would exclude 

 use on steering axle (except for farm vehicles, implements of husbandry, and if off-road 

 equipment is used on highway at restricted speeds). 

 h. With less than 2/32 inch tread when measured at any point on a major tread groove. 

i. Tire size shall be the same on each side of the front and/or rear axle. Tire size may 

be different between front and rear axles as determined by vehicle manufacturer. 

(l) Wheels and Rims

1. Lock or Side Ring. Bent, broken, cracked, improperly seated, sprung or mismatched 

ring(s). 

2. Wheels and Rims. Cracked or broken or has elongated bolt holes. 

3. Fasteners (Both Spoke and Disc Wheels). Any loose, missing, broken, cracked, stripped or 

otherwise ineffective fasteners. 

4. Welds. 

 a. Any cracks in welds attaching disc wheel disc to rim. 

 b. Any cracks in welds attaching tubeless demountable rim to adapter. 

 c. Any welded repair on aluminum wheel(s) on a steering axle. 

 d. Any welded repair other than disc to rim attachment on steel disc wheel(s) mounted on 

 the steering axle. 

(m) Windshield Glazing.
Page 23

1. Windshield Critical Viewing Area is the area covered by the sweep of the wiper(s) 

exclusive of the outer two inches within the perimeter of the wiper(s) sweep, provided by the 

vehicle manufacturer. 

2. Windshields having any of the following defects will be rejected: 

 a. Any broken glass with sharp or jagged edges inside or outside. 

 b. Any stone bruise, star break, or bulls eye, damage in excess of one inch in diameter 

 within the critical viewing area or larger than two inches outside the critical viewing 

 areas, or multiple such damage. 

 c. Single line cracks which extend more than three inches into the critical viewing area. 

 d. Multiple cracks, having one or more which extends into the critical viewing area. 

 e. Wiper scrape(s) in excess of 1/4 inch wide within the critical viewing area. 

 f. Clouding extending more than three inches within the perimeter of the exposed glass. 

 g. No poster, sticker decal, etc. shall be attached to the windshield in such a manner so as 

 to obstruct the vision of the operator. 

 h. i. Any tinting or reflective material applied by brush, spray, or adhesive which is 

 below the uppermost six inches of the windshield or which may encroach upon the 

 driver's direct forward viewing area. (All such tinting provided by the original 

 manufacturer in compliance with applicable Federal Motor Vehicle Safety Standards 

 is acceptable.) 

 ii. Window Tinting. Aftermarket tinting or alterations that do not change the 

 transparency beyond that of the standards set forth in 49 CFR Part 571.205 is 

 acceptable on windows immediately adjacent to the operator and front passenger seat 

 and the windows immediately to the rear of the operator and front passenger seat. The 

 rear window may also be so tinted provided the vehicle is equipped with two outside 

 rear view mirrors. The windshield may only be tinted down to the AS-1 line usually 

 located in the uppermost six inches of the windshield. 

3. 540 CMR 4.05(14)(m)2.h. shall not apply to the following: 

 a. All window tinting as provided by the original manufacturer that is in compliance with 

 applicable Federal Motor Vehicle Safety Standards. 

 b. Authorized vehicles used to transport K-9 teams. 

 c. Vehicles registered out of state. 

 d. Vehicles for which a medical exemption has been issued by the Registry of Motor 

 Vehicles. 

 e. All windows to the rear of the operator's seat on vehicles used for public livery, except 

 taxicabs. 

(n) Windshield Wipers

1. Any power unit that has an inoperative wiper, or missing or damaged parts that render it 

ineffective. 

2. Test for Proper Operation. If the vehicle was equipped with two wipers as furnished by the 

manufacturer, both must be maintained in good working order. Wiper blades must properly 

contact the windshield, be of the same length as those furnished as original equipment and 

the rubber elements must be free from damage or tears. 

3. If the vehicle was equipped with windshield cleaner equipment as furnished by the 

manufacturer, units must be maintained in good working order. 

(o) Fuel Tank Cap Visual Check. The vehicle shall fail the gas cap visual check if the cap is 

missing, defective or does not properly fit the vehicle. 

4.06: Procedures for Inspection of Motorcycles

(1) Prior to Beginning Inspection. A visual check of the motorcycle shall be made to determine that 
Page 24

under-inflated tires, condition of suspension and other conditions visible to the inspector will not 

impede or interfere with the proper aiming of headlamps. In order to proceed with inspection, a 

properly functioning side stand or center stand must be able to support the weight of the motorcycle 

while wheels, front end and swing arm are examined. Passenger foot rests should be put in an 

upright stored position, if possible, to prevent interference with the inspection. 

(2) Inspection of the Motorcycle. 540 CMR 4.06 shall apply to two wheeled motorcycles or two 

wheeled motorcycles with a side car. All inspections must be performed in accordance with the 

applicable provisions of 540 CMR 4.00 by certified inspectors in the approved inspection area only. 

Inspectors must first collect the proper fee and secure the proper Certificate of Registration. The 

Certificate of Registration shall be inspected and the information contained thereon, including 

license plate, motorcycle description, and vehicle identification number, shall be verified by 

observation of the subject motorcycle. The information contained on the Certificate of Registration 

shall also be matched with the motorcycle information accessible to the workstation. The data 

appearing on the Registration Certificate, the data accessible on the Workstation, the data appearing 

on the motorcycle license plate, and the vehicle identification number and motorcycle description 

must match in order for the inspection to proceed. No fee shall be assessed for an inspection which 

does not proceed due to a data match failure. The following inspection shall then be completed: 

(a) The number plate must be undamaged, securely horizontally mounted on the rear of the 

motorcycle, clean and clearly visible. No accessory mounted on the motorcycle may interfere 

with a clear view of the number plate. Any decorative number plate or number plate replica 

not issued by the Registry of Motor Vehicles for the motorcycle being inspected on which 

appears any jurisdictional name must be removed from the motorcycle. 

(b) A Turnaway Document must be given to the operator of any motorcycle refused for inspection 

due to an incorrect vehicle identification number, registration number, or for any reason a 

motorcycle is otherwise refused for inspection. 

(c) Upon the successful completion of the inspection and a determination by the inspector that the 

motorcycle meets all inspection requirements, the inspector shall affix a new Certificate of 

Inspection to the license plate of the motorcycle and provide the motorist will with all inspection 

documentation and program literature as required. 

(d) Certificate of Rejection Document. A motorcycle which is determined by the Inspector not to 

meet all inspection requirements shall be issued a Certificate of Rejection document in accordance 

with any regulations, policies or procedures of the Registrar. 

(3) Brakes. 

(a) Brakes must be adequate to stop a motorcycle from a speed of 20 m.p.h. in not more than 19 

feet. Each motorcycle shall have either a split service brake system or two independently actuated 

service brake systems which, upon application, act on front and rear wheels. Any motorcycle 

which has a number plate issued under the provisions M.G.L. c. 90, § 6A (Plates for antique motor 

cars) which was not manufactured with either a split service brake system or two independently 

actuated service brake systems shall be required to have one brake system adequate to stop said 

motorcycle within the aforementioned distances. For more recent model motorcycles observe 

whether the motorcycle utilizes a brake anti-lock equalizer system which proportionately controls 

braking pressure to the front and rear wheels. 

 (b) Mechanical Brake System. Inspect the linkage, cables, pivots and bearings for high friction, 

wear and broken or missing parts. Reject motorcycle if: 

1. Brake adjustment changes under any steering or loading. 

2. Cotter pins are missing. 

3. Pins or clevises are worn more than 25% of the original diameter. 
Page 25

4. The cam operating lever has been repositioned on the shaft as a means of avoiding 

replacement of worn cam, shoes or lining. 

5. Any cables are frayed (two or more broken strands). 

6. Any brake adjustment mechanism which will not maintain an adjusted position or is 

adjusted to its maximum extent. 

7. Front brake cable is routed so as to be pinched between fork and frame. 

8. There is any roughness, binding, or jamming in levers or pedals. 

9. Less than 1/3 reserve remains in hand or foot brake when brakes are applied. 

10. Modifications make the pedal or lever inaccessible for adequate leverage or operation. 

11. Any portion of the brake hand lever is broken or missing. 

(c) Hydraulic Brake System. Visually inspect the condition of the hydraulic system. Note: Do Not 

Remove Wheels. Reject the motorcycle if: 

1. Hoses or tubing leaks or they are cracked, chafed, flattened, restricted or are improperly 

fastened. 

2. Master cylinder leaks or the reservoir capacity is less than the manufacturer's 

recommended safe level if known or less than 1/2 total capacity. 

3. There is any leakage in the brake system. 

4. The push rod is improperly adjusted. 

5. Wheel cylinder or caliper leaks or fails to function. 

(d) Hydraulic System Tests. Test motorcycle in a standing position. The inspector should be able 

to maintain brake or hand lever reserve under moderate force (40-60 lbs.) for 15 seconds. Reject 

the motorcycle if brake reserve cannot be maintained for 15 seconds or if there is less than 

approximately 1/3 of the total available pedal or brake lever travel remains. The brake lever and 

pedal should exhibit smooth, firm and responsive action. 

 Allow wheels to turn freely when not in the braking mode. Reject the motorcycle if binding 

occurs and wheels do not turn freely. 

(e) Visual Inspection of Brake Pads and Discs. Where pads and discs are visible check and reject 

if: 

1. There is any substantial crack extending to the edge of the disc or pad. 

2. There is evidence of mechanical damage other than wear. 

3. Friction surface of disc or pad is contaminated with oil, grease or brake fluid. 

4. There is excessive roughness to the disc. 

5. The disc is warped or bent. 

6. Pad is broken, loose or worn beyond replacement indicators. 

(4) Muffler and Exhaust System. 

(a) The motorcycle shall be equipped with a muffler to prevent excessive and unnecessary 

noise which is in good working order and in constant operation. Accelerate motor to half throttle 

position to test for unnecessary noise and emission of any unreasonable amount of smoke. Reject a 

motorcycle which has a muffler cut-out or by-pass of the baffle plates, screens or other original 

internal parts have been removed and not replaced. Unnecessary noise is herein defined as any 

noise which is louder than that emitted by the motorcycle with original manufacturers muffler and 

exhaust system equipment. 

(b) The exhaust system includes the exhaust manifold, the piping leading from the flange at 

the exhaust manifold to and including the muffler and tail piping. Visually and audibly inspect the 

exhaust system and reject the motorcycle if: 

1. Tail pipe end is pinched or obstructed. 

2. System components are not securely fastened with proper clamps or hangers. 

3. The exhaust system is not shielded to prevent riders from being burnt while riding in 

normal seated position. 
Page 26

(5) Steering, Alignment, and Suspension of Front End. 

(a) Wheel Axle Bearings. Place motorcycle on motorcycle accessory lift or center stand and 

slowly spin the wheels. Reject the motorcycle if: 

1. There is noticeable play or roughness when wheel is rotated or a growl is heard when 

wheel is rotated. 

2. Wheel bearing seals are cracked, torn, cut or are discolored a reddish-brown color. 

(b) Wheel Run-Out and Alignment. Inspect front to rear wheel alignment, front wheel to fork 

tube alignment and wheel run-out. Reject motorcycle if: 

1. Front to rear wheel misalignment exceeds one inch. 

2. Front wheel is not vertical and parallel to front fork tubes. 

3. Front fork tubes are bent or damaged preventing full travel and free action of front forks. 

4. Wheel (rim) run-out is greater than manufacturer's suggested serviceable limit or, if 

unavailable, greater than .060". 

(c) Steering Head Bearing or Bushings. With front wheel slightly off the ground, turn handlebars 

side to side. Reject motorcycle if front fork binds. 

(d) Front Fork Tube Suspension. Inspect and reject if: 

 1. Front fork suspension has been removed and replace with a solid connection. 

 2. There is severe leakage (not slight dampness) of front fork tube seal. 

 3. Dampening effect is diminished indicating loss of shock absorber function. 

(e) Handlebars. Inspect handlebars and reject if: 

 1. Handlebars or grips are higher than operator's shoulder level when properly seated upon 

 motorcycle. 

 2. Handlebars are not of sturdy construction or if of lightweight bicycle quality. 

 3. Handlebars do not provide a minimum of 18 inches between grip ends. 

 4. Handlebars are not equipped with grips of non-slip design and material. 

 5. Handlebars prevent front fork from rotating from stop to stop. 

 6. Handlebars are cracked or deformed. 

 7. Handlebars are improperly aligned with front wheel. 

 8. Handlebars are not securely fixed, however, rubber mounted handlebars may have slight 

 movement. 

 9. Handlebars that have been modified or repaired in an unsafe manner. 

(6) Horn. Sound horn and test for adequate signal. The horn must be securely fastened to the 

motorcycle and shall not require removal of the operator's hand from the handlebar for use. The horn 

shall be distinctly audible at a distance of 200 feet under normal atmospheric conditions. The horn 

shall have a steady, non-oscillating tone which shall sound only during the time the activating switch 

is manually applied. The horn shall not be unreasonably loud or harsh. 

(7) Windshield or Windscreen. Windshield or windscreen are not required, but if installed, they shall 

be free of cracks, discoloration or scratches which would create any vision obstruction and they shall 

have no sharp edges. Only approved plexi-glass is permitted. No sign, poster, decal, other nontransparent material or mounting hardware shall be allowed on a windshield or windscreen which 

would obstruct the vision of the operator. 

(8) Tires. Only pneumatic rubber tires shall be permitted. Inspect tires and reject motorcycle if: 

 (a) There is a fabric break or cut, bulge, bump or knot related to the deterioration of the tire 

 structure. 

 (b) There is any ply or cord structure visible. 

(c) There is less than 2/32" of tread depth-measured in a major tread grove nearest the tire center 

using a tire tread depth gauge. 
Page 27

(d) Tire is worn so that a tread wear indicator contacts the road surface in any two adjacent 

grooves. 

(e) Tire has been repaired with a sidewall plug or patch. Tire tube, if known, has been patched. 

(f) There is any combination of radial ply tire with non-radial tire, unless approved by tire or 

motorcycle manufacturer. 

 (g) Tires designated as front or rear only are improperly mounted or tires with directional 

 arrow indication are mounted with arrow in improper rotating direction. 

 (h) Tire is not type approved by the Department of Transportation and/or does not have a "D.O.T." 

designation on the sidewall, or is labeled "Not For Highway Use," "For Racing Purposes Only" or 

displays other similar marking (except for farm vehicles, implements of husbandry, and if off-road 

equipment is used on highway at restricted speeds). 

 (i) Tire is obviously under or over-inflated. 

 (j) Tire is smaller than manufacturer's specified minimum or a size that causes tire to contact with 

the body or chassis. 

 (k) There are rusted or rotted valve stems. 

 (l) A tube type tire is used in a tubeless application. 

(9) Wheels. Inspect wheels and reject motorcycle if: 

(a) Wheel bolts, nuts or lugs are loose, missing or damaged. 

(b) Any part of wheel is bent, cracked, welded or damaged so as to affect safe operation of the 

motorcycle. 

(c) There is more than one missing, bent or broken spoke on spoke style wheels. 

(d) Any wheel is not at least the minimum size recommended by the manufacturer. 

(e) There is not enough thread engagement fork leg clamps or threads are stripped. 

 

(10) Alignment and Suspension of the Rear End.

(a) Swing arm bushing, bearing, or rubber mount. Place motorcycle on motorcycle accessory lift 

or center stand with rear wheel raised and inspect for wear and looseness. Check for lateral 

movement of swing arm by applying side to side force against rear wheel. Reject motorcycle if 

there is more than slight side to side movement of the swing arm or if rubber mounts are cracked, 

broken or torn. 

(b) Shock absorbers. If originally equipped with rear shock absorbers inspect and reject 

motorcycle if: 

 1. Shock absorber is missing. 

 2. Shock absorber mounting bolts or mounts are missing, broken or loose. 

 3. There is severe leakage of shock absorber or associated hydraulic hoses if so equipped. 

 4. Dampening effect is diminished indicating loss of shock absorber function. 

(11) Lighting Devices and Reflectors. 

(a) In General. All lighting devices and reflectors required by applicable Federal Motor 

Vehicle Safety Standards when the particular motorcycle was originally manufactured and such 

devices required by Massachusetts General Law or Rules and Regulations applicable to the 

particular motorcycle inspected shall be securely attached to the vehicle and capable of performing 

their design functions. Lenses must be intact, clean, unobstructed and free from cracks. All lenses 

on stop lamps, tail lamps, turn signal lamps and reflectors must be approved by the Society of 

Automotive Engineers (SAE) and as evidence of such approval indicate the symbol "SAE" on the 

lens. All replacement lighting devices and reflectors shall meet applicable Federal Motor Vehicle 

Safety Standards at the time they were installed. No additional lamp, reflective device or other 

motor vehicle equipment shall be installed that impairs the effectiveness of lighting equipment 
Page 28

required under these regulations. Two or more lamps, reflectors or items of associated equipment 

may be combined if the requirements for each lamp, reflector or item of associated equipment are 

met. 

(b) Headlamps. Each motorcycle shall be equipped with at least one and not more than two 

white headlamps whose beam shall be checked in accordance with the specifications provided by 

the Registrar. The motorcycle headlamp shall be mounted on the front of the motorcycle on the 

vertical centerline, except that if two headlamps are used, they shall be symmetrically distant from 

the vertical centerline and equal in height. The height of the headlamps measured from the road 

surface to the center of the lamp shall be not less than 22 inches nor more than 54 inches. 

Headlamps on motorcycles manufactured in the year 1986 or later shall throw sufficient light 

ahead to make clearly visible all vehicles, persons or substantial objects upon the roadway within a 

distance of 350 feet on a straight highway of uniform grade under normal atmospheric conditions. 

Headlamps on motorcycles manufactured before 1986 shall throw sufficient light ahead to make 

clearly visible all vehicles, persons or substantial objects upon the roadway within a distance of 

115 feet under the same conditions. 

(c) Tail Lamps and Stop Lamps. Each motorcycle shall be equipped with at least one red tail 

light and at least one red stop lamp. The motorcycle tail lamp and stop lamp shall be mounted on 

the rear of the motorcycle on the vertical centerline, except that if two are used, they shall be 

symmetrically distant from the vertical centerline and of equal height. The height of the tail lamps 

and stop lamps measured from the road surface to the center of the lamp shall be not less than 15 

inches nor more than 72 inches. Stop lamps shall be activated with the application of front or rear 

brakes. Tail lamps shall be activated when the headlamps are activated. Tail lamps and stop lamps 

shall be visible under normal night time conditions at a distance of 500 feet and stop lamps shall be 

visible in normal sunlight at a distance of 200 feet. 

(d) Plate Light. Each motorcycle shall be equipped with a white light so arranged as to 

illuminate the rear number plate so that it is plainly visible at a distance of 60 feet. Such light shall 

not emit a tailing glare. 

(e) Reflectors. Each motorcycle shall have at least one rear red reflector mounted on the 

vertical center line except that, if two are used, they shall be symmetrically distant from the 

vertical center line and of equal height. The reflector height above the road surface measured to the 

center of the reflector shall not be less than 15 inches, nor more than 60 inches. Note: reflector(s) 

may be combined with other rear lamps. Motorcycles manufactured on or after January 1, 1968 

shall be equipped with two red side reflectors mounted on each side at or near the rear of the 

motorcycle and shall be equipped with two amber side reflectors mounted on each side at or near 

the front of the motorcycle. The side reflector height above the road surface measured to the center 

of the reflector shall not be less than 15 inches, nor more than 60 inches. 

(f) Turn Signals. Each motorcycle manufactured on or after January 1, 1973 shall be 

equipped with front and rear turn signal lamps. Front turn signal lamps shall be amber mounted at 

or near the front of the motorcycle on each side of the vertical center line at the same height and 

shall have a minimum horizontal separation distance (measured from center of lamps) of 16 

inches. Minimum edge to edge separation distance between turn signal lamp and head lamp shall 

be four inches. Rear turn signals shall be red or amber mounted on each side of the vertical center 

line at the same height and having a minimum horizontal separation distance (measured from 

center of lamps) of nine inches. All turn signal lamps shall be mounted at a height from the road 

surface of not less than 15 inches nor more than 83 inches. Turn signal lamps shall flash at a rate of 

60 to 120 flashes per minute. The turn signal lamp activating control shall be positioned so as to be 

operated without removing the hand from the handlebar and shall properly indicate right and left 

when so switched. Turn signal lamps shall be visible at a distance of 200 feet under normal 
Page 29

daylight conditions. Every motorcycle shall be equipped with a device to permit the front and rear 

directional signals to flash simultaneously if originally equipped by the manufacturer. 

(g) Auxiliary Driving Lamps and Fog Lamps. These lamps are not required, however, if so 

equipped shall be aimed in accordance with specifications provided by the Registrar. Reject 

motorcycle if: 

1. Auxiliary equipment is placed in front of or obstructs any required lamp or reflector. 

2. Fog lamps operate with high beam of headlamp. 

3. Auxiliary driving lamps operate with high beam of headlamp or alone. 

4. Equipped with more than two fog lamps or more than two auxiliary driving lamps. 

5. Auxiliary driving lamps or fog lamps are not mounted at a height above the road surface 

between 12 inches and 42 inches.

(12) Body Components. 

(a) Fenders. Front and rear fenders shall be mounted over both wheels to adequately protect 

rider from road debris and water. All fenders shall cover the width of the tire and a minimum of 

1/4 of a wheel circumference. Reject the motorcycle if fenders come in contact with tires or if 

fenders have sharp edges. 

(b) Exterior Sheet Metal, Moldings and Body Panels. Reject motorcycle if there are sharp edges or 

abnormal protrusions extending beyond normal vehicle extremities so as to constitute a danger to 

pedestrians, rider, passenger or other vehicular traffic. Safety bars or highway bars without sharp 

protrusions and which do not extend beyond the widest portion of the motorcycle and which are 

not further than 15 inches from the foot controls are permitted. 

(c) Seats. Each rider shall have a firmly secured seating area. Reject motorcycle if: 

 1. Seats are not properly secured or have springs or parts protruding which constitute a 

 hazard. 

 2. Foot rests for each designated seating position are not provided. 

(d) Chain Driven Motorcycle. Rotate chain to locate tightest position. Inspect chain under 

simulated road condition and reject if: 

1. Not Adjusted to Manufacturers Specifications. If specifications are unavailable the 

following shall apply: 

 Rigid frame models: minimum 1/2 inch to maximum one inch total up and down 

movement measured on the lower section of the chain midway between the sprockets. 

 Swing arm models: minimum 1/2 inch to maximum two inches total up and down 

movement measured on the lower section of the chain midway between the sprockets. 

2. The chain guard or other covering device is missing, broken, cracked or is not the original 

equipment or equivalent replacement. 

3. Chain or sprockets are excessively worn. 

(e) Side or Center Stand. Inspect and reject if: 

1. The side or center stand will not remain in the stored position. 

2. The side or center stand is cracked, broken or apparent structural weakness is present 

which would not allow the stand to support the motorcycle. 

(13) Frame. Inspect the frame in all areas which would not require the disassembly of any 

components. Reject the motorcycle if: 

(a) Any part of the frame has been removed so as to weaken the original structure. 

(b) Repairs are made in any temporary manner. 

(c) Frame components are cracked, rotted, broken or are in deteriorated or dangerous condition. 

(d) Frame is bent out of alignment causing front to rear wheel misalignment to exceed one inch. 
Page 30

(e) Front steering stops do not prevent the front end from contacting the fuel tank and the tire from 

rubbing against the frame or body panels. 

(14) Fuel System. Check fuel system and controls and reject motorcycle if: 

 (a) There is fuel leakage at any point in the system. 

 (b) Any part of fuel hoses are not securely fastened or fuel tank is not securely mounted. 

 (c) Fuel tank cap is missing or can not be properly secured. 

(d) Throttle does not return to idle position when activating force is removed, if so equipped. 

(e) Fuel hoses are chafed, cracked, split or swollen or are not a fuel resistant type. 

(f) Fuel hoses are routed in proximity to or in contact with high temperature engine parts. 

 (15) Engine. Inspect and reject motorcycle if: 

(a) Motor mounts are broken. 

(b) There is any leakage of oil or other fluids which create tire traction problems or 

contaminate brake pads or shoes. 

(16) Battery. Check battery and reject motorcycle if not securely fastened or if vent tube is not 

properly routed or fastened. 

(17) Rear View Mirror. Each motorcycle shall be equipped with at least one mirror so placed 

and adjusted as to afford the operator a clear, reflected view of the highway to the rear and left side 

of the motorcycle. Check mirror(s) and reject if: 

(a) Mirror is cracked, broken, tarnished or reflective surface is peeled. 

(b) Mirror will not hold adjustment or is not mounted securely to prevent excessive vibration. 

(c) The mirror contains sharp edges, projections or irregular indents capable of producing 

injury. 

(d) Mirror does not provide a minimum of ten sq. inches of reflective surface for a convex 

mirror or 12 sq. inches for a flat mirror. 

(18) Controls. 

(a) Clutch. If equipped with a clutch, reject if any portion of the lever is broken or missing 

(b) Ignition Kill Switch. An ignition kill switch shall be mounted in a secure manner in a readily 

accessible position, if equipped. 

(c) Ignition. Each motorcycle shall be equipped with a locking ignition to prevent the motorcycle 

from being used by unauthorized persons. 

(19) Side Car. Check side car and reject motorcycle if: 

(a) Side car is not securely attached to motorcycle. 

(b) There is a hole in the floor board larger than 1/2 inch in diameter or the floor board is rotted, 

rusted or deteriorated to a degree that creates a hazard to the rider or passenger. 

(c) The side car does not contain a seat which is securely fastened. 

(d) Side car not equipped with rear red tail lamp and stop lamp. 

(e) Side car not equipped with at least one white headlamp on the front of the side car. 

(f) Side car fitted with brake which does not operate properly. 

(g) Mudguard not fitted over sidecar wheel. 
Page 31

4.07: Issuance of Certificates of Inspection, Rejection, and Waiver Procedure

 (1) General Provisions. 

 (a) A separate and distinct charge, as established by the Secretary of Administration and 

Finance, shall be made for each inspection required in accordance with the provisions of 540 

CMR 4.00 and the provisions of M.G.L. c. 90. 

(b) All certificates of inspection or rejection shall be issued in sequential order from lowest to 

highest serial number. 

(c) All Certificates of Inspection or Rejection shall be issued and affixed to the motor vehicle in 

accordance with regulations, policies or procedures established by the Registrar. All Certificates 

of Inspection or Rejection for Trailers will be issued in accordance with the Registrar's 

regulations, policies or procedures relating thereto. 

(2) Certificate of Inspection. Any motor vehicle subject to Safety Inspection only, Combined Safety 

and Emissions Inspection, or Commercial Motor Vehicle Safety and Emissions Inspection, which, 

after inspection, is found to be in compliance with all Safety or Safety and Emissions Inspection 

requirements will be issued a Certificate of Inspection, valid for a period of time to be determined by 

the Registrar in accordance with regulations, policies or procedures established by the Registrar and 

Commissioner. 

(3) Certificate of Rejection. 

(a) Any motor vehicle submitted for inspection that fails to meet all applicable inspection 

requirements shall be issued a Certificate of Rejection, in accordance with the Registrar and 

Commissioner's policy relating thereto. 

(b) A Certificate of Rejection authorizes the operation of a motor vehicle for a period of 60 

calendar days after inspection, 20 days for motorcycles, provided that all safety related equipment 

defect(s) have been corrected prior to continued operation. Safety related equipment defects are 

items of inspection exclusive of emissions inspection items. 7D vehicles must display a current 

7D inspection sticker in order to transport pupils. 

(c) A Certificate of Rejection shall entitle the owner or operator to one free re-inspection, 

provided that the vehicle is submitted for re-inspection at the same inspection station which issued 

the Certificate of Rejection within 60 calendar days for motor vehicles and 20 days for 

motorcycles and 7D vehicles after the date of issue. 

(4) Suspension of Registration. Failure to meet these requirements or obtain a waiver under 540 

CMR 4.00 shall result in the suspension of the motor vehicle's registration pursuant to the authority 

provided in M.G.L. c. 90, § 2 and in accordance with the procedures set forth in M.G.L. c. 90, § 22. 

(a) Commercial Motor Vehicle Certificate of Rejection Procedures. 

1. Any commercial motor vehicle submitted for inspection that fails to meet the applicable 

Safety and Emissions inspection requirements shall be issued a Certificate of Rejection 

provided the safety defects are not identified and listed in the current North American 

Uniform Vehicle Out of Service Criteria as being an out of service condition or restricted 

service condition. 

2. Upon inspecting a Commercial Motor Vehicle, if any item is found to not comply with 540 

CMR 4.00, the inspector shall nevertheless complete the inspection of all other required 

items. The inspector shall provide a list of the items for which the vehicle is being rejected 

and advise the vehicle owner, custodian and/or operator of the violation(s) noted. 

 Copies of all rejection slips shall be kept at the place of inspection and/or stored 
Page 32

electronically for one year from the date of inspection. Copies of all such rejection slips or 

data shall be made available for inspection by the Registrar or any of his authorized 

personnel. The rejection slip shall contain the following information: 

 a. Name of inspection station and station number. 

 b. Date of inspection and signature of the inspector. 

 c. Vehicle registration number, make, year and vehicle identification number. 

 d. Reason for rejection 

 e. Any other information that may be required by the Registrar. 

3. Out of Service Commercial Motor Vehicle. If in the course of inspection of a Commercial 

Motor Vehicle or trailer, an inspector finds an unsafe vehicle, that has a safety hazard as 

defined in the current North American Uniform Vehicle Out of Service Criteria, said 

inspector shall immediately notify the Registry of Motor Vehicles by mailing that same day, 

the rejection slip noting the out of service violations. Said owner or custodian of said vehicle 

that was rejected by reasons of having safety defects of an out of service nature shall not be 

operated until all necessary repairs have been made. A Commercial Motor Vehicle placed out 

of service may be operated to the nearest repair facility if in the opinion of the inspector, it 

may be safe to do so. This operation is restricted to a five day period from the date of 

rejection. Said inspector shall so state on the rejection slip, in the appropriate space, if the 

vehicle is safe to move for the purpose of repairs. No commercial motor vehicle may be 

operated with a rejection certificate with an out of service condition under any circumstances 

unless it is being moved for the purpose of repairs. Any person who operates or any owner or 

custodian, who permits a commercial motor vehicle to be operated in an out of service 

condition except for the movement of said vehicle for repairs, shall be punished by a fine as 

provided in M.G.L. c. 90, § 20. 

4. Procedure For Waiver. A motorist may apply for a waiver of emission inspection standards 

in accordance with the provisions of 310 CMR 60.02(11). 

(5) Inspection Within Seven Days of Purchase (Lemon Aid Law).

 (a) A Certificate of Rejection must be issued to the new owner of a motor vehicle within seven 

days of the date of purchase in order to permit the new owner to void the sale of said vehicle or 

to require the seller to make repairs pursuant to the specified conditions enumerated in M.G.L. c. 

90, § 7N. 

(b) In order to invoke M.G.L. c. 90, § 7N, owner/operators, who have submitted the motor 

vehicle for inspection within seven days of the date of purchase, shall, upon request, be provided 

a written statement, issued by an authorized agent of the inspection station, stating the reasons 

why the motor vehicle failed to pass the Safety or Combined Safety and Emissions Inspection 

and an estimate of the cost necessary for repairs in accordance with the provisions of M.G.L. c. 

90, § 7N. 

4.08: Licensure of Inspection Stations

(1) General Provisions: Licensing Requirements. 

 (a) Applications. Application for a license to operate a Class A, B, C, D, E, F and M 

inspection station, with any endorsements as appropriate, or other inspection license as may be 

issued by the Registrar may be filed with the Registrar by a person engaged in the business of 

servicing, maintaining or repairing motor vehicles or their components. – 

 An applicant for a class M inspection station license must be a Motorcycle Dealer licensed 

pursuant to M.G.L. c. 140, § 58 or a motorcycle repairman who possesses a license required by 

law to carry on a repair business and who has received factory training or equivalent training as 
Page 33

required by the Registrar. 

 1. Selection Criteria. Once the Inspection Station Network is at capacity, as determined by 

 the Registrar, stations wishing to become licensed shall be placed on a waiting list 

 established and maintained by the Registrar. Prospective stations shall be selected for 

 licensure from any such list as established by the Registrar as Inspection Station Network 

 capacity warrants. Stations shall first be selected for licensure in accordance with a 

 determination of geographic need as determined by the Registrar in the exercise of her sole 

 discretion. Network Inspection Station geographic need shall be evaluated on the basis of 

 criteria including, but not limited to, factors such as the density of the population of motor 

 vehicle owners in a geographic area and distance between existing licensed inspection 

 stations as measured by either miles, travel time or both miles and travel time. If Inspection 

 Station Network geographic needs are determined to be adequately met by the Registrar, 

 then inspection station licenses shall be issued in accordance with placement on a waiting 

 list of applicants for inspection station licenses compiled in chronological order by date of 

 submission of application for licensure. 

(b) Information Required. Each application for licensure shall contain such information as 

the Registrar shall require on the application form and be accompanied by a business certificate 

issued to the applicant by the city or town in which the premises is located. 

(c) Application and License Fees. A non-refundable application fee of $ 50.00 made payable 

by cash, certified check or money order to the Registry of Motor Vehicles shall accompany each 

application. When an application is approved by the Registrar, and upon the payment of an 

additional fee of $ 100.00, the applicant shall be granted a license which shall be valid for a period 

of one year from the date of issuance. The annual renewal fee shall be determined by the Secretary 

of Administration and Finance. An applicant applying for a license at more than one location will 

be required to file a separate application for each location. A licensee may change his station 

location upon payment of a $ 50.00 application fee and the approval of the new location. Licenses 

are not transferable. In the event of any change of ownership or interest in the business, an 

application for a new license must be filed. The Registrar must be notified immediately by the 

licensee in the event that arrangements are made for the transfer of the business to another person. 

Upon the transfer of ownership or termination of the business, the station license, all unused 

Certificates of Inspection, Rejection, and records required to be kept in accordance with the 

provisions of 540 CMR 4.00 shall be surrendered and returned to the Registry of Motor Vehicles 

forthwith. Unused Certificates of Inspection will be rebated. 

(d) Certificate of License and Display Requirements. The licensee shall conspicuously 

display the numbered class license issued by the Registrar in an area that is reserved for inspection 

purposes. In case of loss, mutilation or destruction of the license, the Registrar shall issue a 

duplicate license upon proper proof thereof and payment of a fee of $ 25.00. 

(e) Requirements to Purchase and Security of Certificates of Inspection. Each licensee shall 

maintain adequate security, acceptable to the Registrar, which will prevent the misappropriation of 

Certificates of Inspection or Rejection. Missing or stolen Certificates of Inspection or Rejection 

must be reported forthwith to the Registry of Motor Vehicles and local law enforcement. 

(f) Supplies. Each Licensee shall maintain, if required, an adequate supply of Certificates of 

Inspection, test authorizations, if required, and sticker and sticker stock. to assure that motorists 

will not be denied inspections, or unnecessarily inconvenienced. Said documents shall be 

purchased from the Registry of Motor Vehicles or its designated agent in accordance with the 

applicable policies established by the Registrar and may not be sold or transferred from one station 

to another. 

(g) Requirements for Personnel Who Administer Inspections. Inspections must be performed 
Page 34

by the licensee or permanent employees of the licensee who are in possession of a valid motor 

vehicle operator license. A person who performs safety inspections shall be licensed by the 

Registrar. That license shall be renewed annually. A permanent employee shall, for purposes of 

540 CMR 4.00, be defined as a person regularly employed by the licensed inspection station for a 

minimum of 20 hours per week. Persons performing inspections must be able to demonstrate their 

proficiency in inspecting motor vehicles and in operating, calibrating, and maintaining items or 

equipment required for the inspection of motor vehicles, to personnel authorized by the Registrar, 

the Massachusetts Commissioner of the Department of Environmental Protection assigned to 

program administration and enforcement and the Network Contractor. Any person conducting a 

Class M inspection must provide proof that he has received either factory training, or training 

approved by the Registrar. The inspector must have a valid motorcycle license. 

(h) Requirements For Personnel Who Administer Commercial Motor Vehicle Inspections. It 

shall be the licensed commercial motor vehicle inspection station's or the mobile commercial 

motor vehicle inspector's responsibility to ensure that the individual(s) performing an annual 

inspection as contained herein are qualified as follows: 

1. Understands the inspection criteria set forth in 49 CFR Parts 393 and Appendix G to Part 

396 and can identify defective components; 

2. Is knowledgeable of and has mastered the methods, procedures, tools and equipment used 

when performing an inspection; and 

3. Is capable of performing an inspection by reason of experience, training, or both as 

follows: 

 a. Successfully completed a State or Federal sponsored training program or has a certificate 

 from a State or Canadian Province which qualifies the person to perform commercial 

 motor vehicle safety inspections, or 

 b. Have a combination of training and/or experience totaling at least one year. Such 

 training and/or experience may consist of: 

 i. Participation in a truck manufacturer-sponsored training program or similar commercial 

 training program designed to train students in truck operation and maintenance; 

 ii. Experience as a mechanic or inspector in a motor carrier commercial motor vehicle 

 maintenance program; 

 iii. Experience as a mechanic or inspector in commercial motor vehicle maintenance at a 

 commercial garage, fleet leasing company or similar facility; or 

 iv. Experience as a commercial vehicle inspector for a State, Provincial or Federal 

 Government agency. 

4. All personnel who perform any part of the actual commercial vehicle inspection shall be in 

possession of a valid Commercial Driver's License (CDL). 

 a. Written evidence of that individual's qualifications under 540 CMR 4.08(1)(h) shall be 

 retained by the commercial motor vehicle inspection station for the period during which 

 that individual is performing annual motor vehicle inspections for the commercial motor 

 vehicle inspection station and for one year thereafter. 

 b. All Commercial Motor Vehicle Inspectors shall be subject to testing and shall be 

 licensed by the Registrar. Said license shall be renewed annually. 

5. Availability of Premises and Records to Authorized Personnel. All licensees shall record 

and retain records pertaining to the inspection performed in accordance with the policies and 

procedures established by the Registrar. Facilities, records, and equipment shall, during the 

licensee's normal business hours, be available at the address recorded on the Class A. B, C, 

D, E, F, M License (with any additional endorsements) to enforcement personnel of the 

Executive Office of Transportation, Registry of Motor Vehicles, and/or Department of 
Page 35

Environmental Protection and the Network Contractor. 

(2) Facility, Equipment, and Inspection Station Requirements 

 (a) Promotions. No licensed inspection facility may advertise the Massachusetts vehicle 

safety and emissions inspection program in conjunction with any offer, promotion or discount of 

any product, service or commodity to any Customer. Nothing in the preceding sentence shall 

prohibit a licensed inspection facility from including in any advertisement that it is a licensed 

inspection facility. 

(b) Signs. The facilities of public station Licensees should be available for the convenience 

of the public. Public station Licensees shall conspicuously post and display identification as a 

"Massachusetts Inspection Station" on a sign not less than 24” x 36”, including the station's license 

number and the regular hours of inspection. Hours of inspection may be posted on a separate sign. 

All stations performing Commercial Motor Vehicle Inspections must post their commercial motor 

vehicle inspection labor rate. Such signs must be removed or covered whenever inspections cannot 

be performed during the posted hours. 

(c) Inspection Area. A specific unobstructed area approved by the Registrar within which the 

complete motor vehicle inspection shall be performed, must be enclosed in a building in the 

primary service facility of the licensees' premises. The inspection area of all classes of inspection 

stations except M, must be at least thirty feet in length and twelve feet in width, and said 

inspection area must exceed by five feet in width the width of the widest vehicle inspected. The 

inspection area for class M Inspections shall be 30 feet or less in length, or as determined by the 

Registrar. Exceptions to these standards may be provided by the Registrar or his designee in his 

sole discretion. All inspection stations first licensed on or after October 1, 2008 shall meet the new 

inspection bay size requirements. All inspection stations licensed before October 1, 2008 shall be 

required to meet the bay size requirements in effect at the time of licensure. Designated areas shall 

be suitably marked or otherwise outlined and include a smooth, level, substantial floor on which 

the wheels of the vehicle will stand evenly while being inspected and must be maintained in a neat 

manner. The Registrar, in his sole discretion, may also approve an additional specifically 

designated area on the licensees' premises convenient to the approved inspection bay to be used for 

the inspection of vehicles and/or trailers and converter dollies. Any modification of the inspection 

area or approved additional area must be approved by the registrar. 

(d) Equipment Required. 

1. General Requirements. All Inspection station licensees must possess the necessary tools 

and equipment, and shall maintain same in good working order, and shall possess facilities 

necessary for the ordinary repair and adjustment of motor vehicles or components on which 

inspection is required. In addition to the preceding, Licensees must be equipped with the 

following equipment that has been approved by the Registrar, applicable to the particular 

class license as noted. 

 a. Headlamp aiming screen or device as approved by the Registrar for Class A, B, C, D, 

 E, F, and M licenses. 

 b. Dial indicator gauge. All classes except M . 

 c. Registry approved brake meter. All classes except M. 

 d. Tire tread depth gauge, marked 32nds of an inch. All classes. 

 e. Jack of sufficient capacity to lift the front axle of the heaviest vehicle inspected. All 

 classes. 

 f. Two jack stands; with a minimum rated capacity capable of holding the vehicle to be 

 inspected. All classes except M. 

 g. Inspector workstation equipment. All classes. 
Page 36

 h. Registry of Motor Vehicles Inspection Manual. All classes. 

 i. Registry approved 48 inch long headlight aiming stick unless approved mechanical 

 headlight aiming device is used. 

 j. Registry approved tint meter for glass. All classes except M and fleet stations. 

 k. Air, power and phone lines or communication link to operate the inspection equipment 

 properly. 

 .l. A commercial motor vehicle inspection station is required to have a current copy of 

 FMCSR Parts 390 to 397 and appendix G available for inspector use. 

2. Fleet Inspection Stations. Licensees are limited to the inspection of motor vehicles owned 

or maintained by the licensee or other fleets. 

 Inspection Area. The licensed Fleet Inspection Station must provide a specific area within 

which the complete inspection shall be performed except where additional testing is required 

for brakes. The area must be in a building, enclosing an area at least 30 feet in length and 

twelve feet in width and said inspection area must exceed by five feet in width the width of 

the widest vehicle inspected except as otherwise approved by the Registrar. . All fleet 

inspection stations first licensed on or after October 1, 2008 shall meet the new inspection 

bay size requirements. All inspection stations licensed before October 1, 2008 shall be 

required to meet the bay size requirements in effect at the time of licensure. The designated 

area shall be suitably marked or otherwise outlined and include a smooth, substantial level 

floor on which all the wheels of the longest vehicle inspected will stand evenly while being 

inspected. Additional adequate space must be available within the building for repairing and 

maintaining motor vehicles. 

3. Public Commercial Motor Vehicle Inspection Facility. Class C, D and E and Facilities 

Utilizing Services of Class F Licensees using mobile equipment. A commercial motor 

vehicle inspection station shall have a specific area approved by the Registrar within which 

the complete inspection of all commercial motor vehicles so defined shall be performed. The 

area shall be a suitably marked, smooth, level, unobstructed concrete flooring. The 

dimensions of a public commercial motor vehicle inspection facility shall at a minimum be: a 

length ten feet longer than the longest single or combination commercial motor vehicle to be 

inspected, with a minimum of at least 45 feet in length and a minimum of at least 14 feet in 

width. All axles of any single or combination commercial motor vehicle inspected must be 

on the same flat, level flooring. The area shall be equipped to provide regulated air supply of 

sufficient pressure and electrical power to any non-self powered commercial motor vehicle 

which in combination cannot be accommodated in the designated area. The designated area 

shall be enclosed in a building having an entrance door of no less than 12 feet in width and 

12 feet in height or as approved by the Registrar. All public commercial motor vehicle 

inspection facilities first licensed on or after October 1, 2008 shall meet the new inspection 

bay size requirements. All inspection stations licensed before October 1, 2008 shall be 

required to meet the bay size requirements in effect at the time of licensure. 

(3) Revocation, Suspension or Denial of Licenses. 

(a) The Registrar may, after the applicant, licensee or person licensed by the Registrar to 

perform safety inspections has been granted a hearing held at such time and place as the Registrar 

may prescribe and duly notice to the licensee, refuse to issue a license, suspend or revoke a license 

or refuse to issue the renewal of a license for any of the following causes: 

1. Failure to comply with any of the Rules and Regulations or the written Policies and 

Procedures of the Registrar or Commissioner pertaining to License Class A,B,C,D,E, F and 
Page 37

M Inspection Stations. 

2. Failure to inspect vehicles during posted inspection hours. 

3. Failure to have on hand at all times an adequate supply of Certificates of Inspection. 

4. Failure to maintain that portion of premises utilized as an inspection area in a proper 

manner. 

5. Failure to properly maintain equipment utilized in inspections procedures. 

6. Engaging in fraudulent practices or conduct during the inspection of motor vehicles. 

7. The issuance of a Certificate of Inspection or Certificate of Rejection without performing 

the required emissions test, if applicable. 

8. For any action deemed by the Registrar or Commissioner of the Department of 

Environmental Protection to violate the terms and public purpose of the vehicle inspection 

program. 

(b) Mailing, by first class mail, postage prepaid, of a notice of a hearing to the last known 

address of a licensee or applicant, 14 days prior to the date of the hearing, shall be deemed proper 

notice. 

 (c) Second, third, and subsequent infractions shall be infractions committed within the three years 

 immediately preceding the date of the infraction for which the Registrar orders another suspension 

 or revocation. The total number of prior infractions, in any combination, shall determine if a 

 second or subsequent offense exists. 

 (d) If the licensee appeals the Registrar's decision to revoke or suspend a license, the Registrar, 

 upon a timely request, may allow the suspension or revocation to be stayed pending a hearing 

 before the Motor Vehicle Board of Appeal on Motor Vehicle Liability, Policies and Bonds if said 

 suspension is not based upon activity which would constitute a threat to the public safety. 

(e) The Registry shall suspend the license of an inspector or a station for a minimum of 180 days 

for intentionally improperly passing a motor vehicle for the emissions test required pursuant to 310 

CMR 60.02. A second or subsequent violation within three years shall result in a license 

revocation. 

(f) Suspensions or revocations of the license of any Class A,B,C,D,E,F and M inspection station, in 

addition to that identified immediately above in 540 CMR 4.08(3)(e) shall be in accordance with 

the following chart: 

SUSPENSION PERIODS FOR VIOLATIONS OF INSPECTION PROCEDURE REQUIREMENTS

(Certificates of Inspection, as used herein, includes Certificates of Rejection) 

Type of Offense 1st

Infraction 

2nd

Infraction 

3rd / Subsequent 

Infraction 

1. Failure to maintain inspection bay in proper manner. 

2. Failure to maintain adequate supply of Certificates of 

Inspection or Rejection. 

3. Failure to maintain adequate security of Certificates of 

Inspection and test authorizations. 

4. Failure to properly keep required records or properly complete 

required entries on Certificate of Inspection 

5. Failure to charge the established inspection fee. 

6. Failure to comply with any provisions of 540 CMR 4.00 or the 

Registrar's written policies or procedures relating thereto not 

otherwise specified herein. 

7. Unauthorized person performing inspection. 

Up to 60 

Days 

Up to120 

Days Up to240 Days 
Page 38

1. Failure to apply Certificates of Inspection, or Rejection to 

vehicle as required. 

2. Issuing Certificates of Inspection without performing a 

complete inspection. 

3. Failure to perform complete inspection in designated inspection 

bay. 

4. Failure to have on hand required equipment in proper working 

condition. 

Up to 60 

Days 

Up to120 

Days 

Up 

to180 

Days 

Revoke 

1. Suggesting or requiring that un necessary repairs or 

adjustments be made in order for vehicle to pass inspection. 

2. Falsification or alteration of recorded data pertaining to 

inspection. 

Up to180 

Days 

Up to260 

Days 

Up 

to540 

Days 

Revoke 

1. Licensee or employee performing inspections while under the 

influence of liquor or drugs. Revoke Revoke Revoke Revoke 

4.09: Licensure of Inspectors - License Application Procedures and Fees.

(1) To obtain a license to conduct motor vehicle inspections from the Registrar, a person must be trained 

and certified by the Registrar and DEP pursuant to 310 CMR 60.02 and 540 CMR 4.00. 

(2) The applicant must provide proof of certification and a valid driver license together with a nonrefundable fee which shall be established by the Secretary of Administration and Finance pursuant to 

M.G.L. c. 90, § 33 and 801 CMR 4.02. 

(3) The fee is payable to the Registry of Motor Vehicles and shall accompany each application. 

(4) When the application is approved by the Registrar, the applicant shall be granted a license which 

shall be valid for a period of one year from the date of issuance. The license shall be renewable annually 

at a fee which shall be established by the Secretary of Administration and Finance pursuant to M.G.L. c. 

90, § 33 and 801 CMR 4.02. 

REGULATORY AUTHORITY 

540 CMR 4.00: M.G.L. c. 90, §§ 2, 7A, 7V(a), (b) and (c), 7W and 31. 

 310 CMR 60.02: M.G.L. c. 111, § 142M