NIST HB 150-2016

National Voluntary

Laboratory Accreditation Program

Procedures and

General Requirements

Warren R. Merkel

Vanda R. White

This publication is available free of charge from: 

http://dx.doi.org/10.6028/NIST.HB.150-2016
NIST HB 150-2016

National Voluntary

Laboratory Accreditation Program

Procedures and

General Requirements

Warren R. Merkel

Standards Services 

Standards Coordination Office

Laboratory Programs 

Vanda R. White 

National Voluntary Laboratory Accreditation Program 

Standards Coordination Office

Laboratory Programs 

This publication is available free of charge from: 

http://dx.doi.org/10.6028/NIST.HB.150-2016

July 2016 

U.S. Department of Commerce

Penny Pritzker, Secretary

National Institute of Standards and Technology

Willie May, Under Secretary of Commerce for Standards and Technology and Director
NVLAP AND THE NVLAP LOGO

The term NVLAP and the NVLAP logo are registered marks of the 

Federal Government, which retains exclusive rights to control the use 

thereof. Permission to use the term and symbol (NVLAP logo with 

approved caption) is granted to NVLAP-accredited laboratories for the 

limited purpose of announcing their accredited status, and for use on 

reports that describe only testing and calibration within the scope of 

accreditation. NVLAP reserves the right to control the quality of the 

use of the NVLAP term, logo, and symbol

National Institute of Standards and Technology Handbook 150 

Natl. Inst. Stand. Technol. Handb. 150-2016, 36 pages (July 2016) 

CODEN: NIHAE2

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iv NIST Handbook 150-2016

Contents

Foreword ...................................................................................................................................................... vi

Introduction ................................................................................................................................................. vii

1 General information ............................................................................................................................... 1

1.1 Purpose and scope .......................................................................................................................... 1

1.2 Organization of handbook .............................................................................................................. 1

1.3 Program description ....................................................................................................................... 1

1.4 References ...................................................................................................................................... 2

1.5 Terms and definitions ..................................................................................................................... 3

1.6 NVLAP information ....................................................................................................................... 8

1.7 Confidentiality ................................................................................................................................ 8

1.8 Referencing NVLAP accreditation ................................................................................................ 8

1.9 Mutual recognition ......................................................................................................................... 9

1.10 Accreditation of laboratories located outside of the United States ................................................ 9

1.11 Complaints ..................................................................................................................................... 9

2 LAP establishment, development and implementation ........................................................................ 10

2.1 Bases for establishment ................................................................................................................ 10

2.2 Development of technical requirements ....................................................................................... 11

2.3 Announcing the establishment of a LAP ...................................................................................... 11

2.4 Adding to or modifying a LAP .................................................................................................... 11

2.5 Termination of a LAP .................................................................................................................. 12

3 Accreditation process ........................................................................................................................... 12

3.1 Application for accreditation ........................................................................................................ 12

3.2 Management system review ......................................................................................................... 13

3.3 On-site assessment ....................................................................................................................... 14

3.4 Proficiency testing ........................................................................................................................ 16

3.5 Accreditation decision .................................................................................................................. 17

3.6 Granting accreditation .................................................................................................................. 18

3.7 Renewal of accreditation .............................................................................................................. 18

3.8 Monitoring visit ............................................................................................................................ 19

3.9 Changes to scope of accreditation ................................................................................................ 19

3.10 Suspension of accreditation .......................................................................................................... 19

3.11 Revocation of accreditation .......................................................................................................... 20

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3.12 Voluntary termination of accreditation ........................................................................................ 20

3.13 Appeals ......................................................................................................................................... 20

4 Criteria for accreditation....................................................................................................................... 21

4.1 General ......................................................................................................................................... 21

4.2 NVLAP program-specific requirements ...................................................................................... 21

Annex A (normative) Referencing NVLAP accreditation .......................................................................... 22

Annex B (normative) Implementation of traceability policy in accredited laboratories ............................. 28

Annex C (normative) Conditions for accreditation ..................................................................................... 32

Annex D (normative) Accreditation of laboratories located outside of the United States .......................... 34

Annex E (normative) Use of the Accredited Laboratory Combined ILAC MRA Mark ............................ 35

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vi NIST Handbook 150-2016

Foreword

The NIST Handbook 150 publication series sets forth the procedures, requirements, and guidance for the 

accreditation of testing and calibration laboratories by the National Voluntary Laboratory Accreditation 

Program (NVLAP). The series is comprised of the following publications:

• NIST Handbook 150, NVLAP Procedures and General Requirements, which contains the general

procedures and requirements under which NVLAP operates as an unbiased third-party

accreditation body;

• NIST Handbook 150-xx program-specific handbooks, which supplement NIST Handbook 150 by

providing additional requirements, guidance, and interpretive information applicable to specific

NVLAP laboratory accreditation programs (LAPs).

The 2016 edition of NIST Handbook 150 supersedes and replaces the 2006 edition. There are no changes 

to the technical requirements for accreditation. 

In addition to a number of editorial revisions, the following main changes have been made with respect to 

the previous edition of the handbook: 

• incorporation of previously issued NVLAP Policy Guides and updated definitions and references;

• addition of Annex E, which contains the requirements for accredited laboratories wishing to use

the Accredited Laboratory Combined ILAC MRA Mark;

• removal of the managerial and technical requirements of ISO/IEC 17025, which were previously

contained in NIST Handbook 150 clauses 4 and 5, respectively.

The last item reflects NVLAP’s decision to require applicant laboratories to have an official copy of 

ISO/IEC 17025 in order to proceed with the accreditation process (see the new clause 4 for additional 

information).

Annexes A through E form a normative part of this handbook, meaning they contain provisions that 

laboratories must meet in order to conform to the requirements for accreditation. This handbook is 

available on the NVLAP website (http://www.nist.gov/nvlap) and on request from NVLAP. 

Questions or comments concerning this handbook should be submitted to NVLAP, National Institute of 

Standards and Technology, 100 Bureau Drive, Stop 2140, Gaithersburg, MD, 20899-2140; phone: 

301-975-4016; fax: 301-926-2884; e-mail: nvlap@nist.gov. 

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Introduction

As set forth in Part 285 of Title 15 of the U.S. Code of Federal Regulations, the National Voluntary 

Laboratory Accreditation Program (NVLAP) accredits testing and calibration laboratories that are found 

competent to perform specific tests or calibrations, or types of tests or calibrations. NIST Handbook 150 

presents the basic procedures under which NVLAP operates, and incorporates by reference the 

accreditation requirements of ISO/IEC 17025, General requirements for the competence of testing and 

calibration laboratories. ISO/IEC 17025 and this handbook contain the general requirements that testing 

and calibration laboratories must meet if they wish to demonstrate that they operate an appropriate 

management system, are technically competent, and are able to generate technically valid results.

NVLAP operates an accreditation system that conforms to ISO/IEC 17011, Conformity assessment—

General requirements for accreditation bodies accrediting conformity assessment bodies, which requires 

that the competence of applicant laboratories be assessed by the accreditation body against the 

requirements of ISO/IEC 17025. 

Growth in the use of management systems generally has increased the need to ensure that laboratories that 

form part of larger organizations or offer other services can operate to a quality management system that 

is seen as compliant with ISO 9001, as well as with ISO/IEC 17025. Care was taken by the ISO 

Committee on Conformity Assessment (CASCO) to incorporate all those requirements of ISO 9001 that 

are relevant to the scope of testing and calibration services that are covered by the laboratory’s 

management system. Testing and calibration laboratories that comply with the requirements of this 

handbook will, therefore, also operate in accordance with the principles of ISO 9001, as stated in the 

introduction of ISO/IEC 17025. 

NVLAP has entered into mutual recognition arrangements (MRAs) with equivalent accreditation bodies 

that comply with ISO/IEC 17011 and applicable MRA documents. The use of this handbook will promote 

cooperation among laboratories and other bodies, and assist in the exchange of information and 

experience and in the harmonization of standards and procedures. This should, in turn, facilitate the 

acceptance of testing and calibration results among economies worldwide.

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1 General information

1.1 Purpose and scope

1.1.1 NIST Handbook 150 sets forth the procedures and general requirements under which the National 

Voluntary Laboratory Accreditation Program (NVLAP) operates as an unbiased third party to accredit 

both testing and calibration laboratories.

1.1.2 The NIST Handbook 150-xx series program-specific handbooks supplement the requirements in 

NIST Handbook 150 by providing additional requirements, guidance, and interpretive information 

applicable to specific NVLAP laboratory accreditation programs (LAPs).

1.1.3 This handbook is for use by laboratories in developing the management and technical systems

that govern their operations. Laboratory customers, regulatory authorities, and accreditation bodies may 

also use it as a basis upon which to judge the competence of laboratories.

1.1.4 If a testing or calibration laboratory fulfills the requirements of this handbook, it meets both the 

technical competence requirements and the management system requirements that are necessary for it to 

consistently deliver technically valid test results and calibrations.

1.1.5 Compliance with regulatory and safety requirements for the operation of laboratories is not 

addressed by this handbook. Such requirements may be addressed, if appropriate, in the NIST Handbook 

150-xx series of program-specific handbooks (see Clause 4). 

1.2 Organization of handbook 

1.2.1 Clause 1 of this handbook describes considerations that relate in general to all aspects of NVLAP. 

Clause 2 describes how LAPs are requested, developed, announced, modified, and terminated. Clause 3 

contains the procedures that define the accreditation process, including arrangements for granting, 

maintaining, extending, reducing, suspending, and withdrawing accreditation. Annexes A through E 

present requirements for referencing NVLAP accreditation and achieving traceability, conditions for 

NVLAP accreditation, information and requirements for laboratories located outside the United States, 

and rules for use of the Accredited Laboratory Combined ILAC MRA Mark. 

1.2.2 The word shall is used throughout NVLAP’s documents and describes mandatory requirements 

for accreditation. The word should is used where guidance is provided but does not preclude other 

acceptable practices. 

1.2.3 A note (shown as NOTE in a smaller font) contains additional information intended to assist the 

understanding or use of the document. Notes may provide clarification of the text, examples, and 

guidance; they do not contain requirements.

1.3 Program description

1.3.1 The National Voluntary Laboratory Accreditation Program (NVLAP) is a U.S. Government 

entity administered by the National Institute of Standards and Technology (NIST), an agency of the U.S. 

Department of Commerce.

1.3.2 NVLAP is a voluntary system that provides a mechanism for the recognition of testing and 

calibration laboratories based on internationally accepted standards. It identifies competent laboratories 

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for use by regulatory agencies, purchasing authorities, and product certification systems, and promotes the 

acceptance of test and calibration results among economies and accreditors to support trade facilitation 

activities worldwide.

1.3.3 LAPs are established on the basis of requests and demonstrated need. The specific tests or 

calibrations, types of tests or calibrations, or standards to be included in a LAP are determined by an open 

process during the development of the LAP (see Clause 2). NVLAP does not unilaterally propose or 

decide the scope of a LAP.

1.3.4 NVLAP administers its policies and procedures in a nondiscriminatory manner. Access to 

NVLAP accreditation is not conditional on the size of a laboratory or on its membership in any 

association or group, nor is it conditional upon the number of laboratories already accredited. NVLAP’s 

accreditation services are available to public and private testing and calibration laboratories, including 

commercial laboratories, manufacturers’ in-house laboratories, university laboratories, and federal, state, 

and local government laboratories.

1.3.5 NVLAP accreditation is based on evaluation of a laboratory’s management and technical 

competence for conducting specific tests or calibrations. Accreditation is granted only after thorough 

evaluation of an applicant has demonstrated that all NVLAP requirements have been fulfilled. Fulfillment 

of requirements is acknowledged by the issuance of a Certificate of Accreditation and a Scope of 

Accreditation, which details the specific test methods, calibration parameters, or services for which a 

laboratory has been accredited.

1.3.6 NVLAP operates a management system that meets the requirements of ISO/IEC 17011.

1.3.7 NVLAP accreditation does not relieve a laboratory from complying with applicable federal, state, 

and local laws and regulations. 

1.4 References

The following documents are referenced in this handbook. For undated references, the latest revision 

applies. When a specific clause(s) of a document is cited, the date of the referenced document is included.

— BIPM/IEC/IFCC/ISO/IUPAC/IUPAP/OIML, Guide to the Expression of Uncertainty in 

Measurement (GUM)

— BIPM/IEC/IFCC/ISO/IUPAC/IUPAP/OIML, International Vocabulary of Basic and General Terms 

in Metrology (VIM)

— ILAC-G21, Cross-Frontier Accreditation—Principles for Cooperation

— ILAC-P10:01/2013, ILAC Policy on Traceability of Measurement Results

— ILAC-P14, ILAC Policy ILAC Policy for Uncertainty in Calibration

— ILAC-R7:05/2015, Rules for the Use of the ILAC MRA Mark

— ISO 9000:2015, Quality management systems—Fundamentals and vocabulary

— ISO 9001, Quality management systems—Requirements

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— ISO/IEC 17000:2004, Conformity assessment—Vocabulary and general principles

— ISO/IEC 17011, Conformity assessment—General requirements for accreditation bodies accrediting 

conformity assessment bodies

— ISO/IEC 17025:2005, General requirements for the competence of testing and calibration 

laboratories

— ISO/IEC 17043:2010, Conformity assessment—General requirements for proficiency testing

— ISO/IEC Guide 2:2004, Standardization and related activities—General vocabulary

1.5 Terms and definitions

For the purposes of this handbook, the relevant terms and definitions given in ISO/IEC 17000 and the

VIM apply. 

NOTE General definitions related to quality are given in ISO 9000, whereas ISO/IEC 17000 gives definitions 

specifically related to certification and laboratory accreditation. Where different definitions are given in ISO 9000, 

the definitions in ISO/IEC 17000 and the VIM are used.

1.5.1 

accreditation

Formal recognition that a laboratory is competent to carry out specific tests or calibrations or types of 

tests or calibrations.

1.5.2 

Approved Signatory

An individual who is designated by a laboratory and deemed competent by NVLAP to sign accredited 

laboratory test or calibration reports. An Approved Signatory is responsible for the technical content of 

the report and is the contact person for questions or problems with the report. Approved Signatories have 

responsibility, authority and technical capability within the organization for the results produced. 

NOTE See ISO/IEC 17025, 5.2.5, and 5.10.2 j).

1.5.3 

assessment, on-site

Systematic, independent, documented process for determining laboratory competence and for obtaining 

records, statements of fact or other relevant information by NVLAP assessors at the laboratory facilities 

and other places where test or calibration services are provided with the objective of determining the 

extent to which NVLAP requirements are fulfilled. 

NOTE FROM ISO/IEC 17000:2004: Whilst “audit” applies to management systems, “assessment” applies to 

conformity assessment bodies as well as more generally.

1.5.4 

Authorized Representative

Individual who is authorized by laboratory top management to commit the laboratory to fulfill the 

NVLAP conditions for accreditation (see Annex C). The Authorized Representative reports to NVLAP 

changes that may affect the laboratory’s capability, scope of accreditation, or compliance with 

accreditation requirements.

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1.5.5 

Certificate of Accreditation

Document issued by NVLAP to a laboratory that has been granted NVLAP accreditation. A Certificate of 

Accreditation is always issued with a Scope of Accreditation. (See also Scope of Accreditation.)

1.5.6 

competence

Ability of a laboratory to conduct tests and perform calibrations in accordance with the specified

standards and to produce accurate, proper, fit for purpose, technically valid data and test and calibration 

results.

1.5.7 

customer

Any person or organization that engages the services of a testing or calibration laboratory.

1.5.8 

interlaboratory comparisons 

Organization, performance and evaluation of measurements or tests on the same or similar items by two 

or more laboratories in accordance with predetermined conditions. 

NOTE In some circumstances, one of the laboratories involved in the intercomparison may be the laboratory that

provided the assigned value for the test item.

[ISO/IEC 17043:2010, 3.4] 

1.5.9 

laboratory 

Organization that performs tests and/or calibrations. When a laboratory is part of an organization that 

carries out activities additional to testing and calibration, the term laboratory refers only to those parts of 

that organization that are involved in the testing and calibration process. A laboratory’s activities may be 

carried out at a permanent, temporary, or remote location.

NVLAP further defines laboratory as being a physical entity—that is, a testing or calibration facility that 

is separate and apart physically from any other laboratory whether or not sharing common ownership, 

management, or quality systems with any other laboratory(s).

1.5.10 

LAP

Laboratory Accreditation Program established and administered under NVLAP, consisting of test 

methods or calibrations relating to specific products or fields of testing or calibration. 

1.5.11 

management system

Set of interrelated or interacting elements of an organization to establish policies and objectives, and 

processes to achieve those objectives. 

[ISO 9000:2015, 3.5.3] 

NOTE A management system of an organization may include different management systems, such as a quality 

management system, a financial management system, or an environmental management system.

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1.5.12 

measurement assurance

Process to ensure adequate measurement results that may include, but is not limited to: 1) use of good 

experimental design principles so that the entire measurement process, its components, and relevant 

influence factors can be well-characterized, monitored, and controlled; 2) complete experimental 

characterization of the measurement process uncertainty including statistical variations, contributions 

from all known or suspected influence factors, imported uncertainties, and the propagation of 

uncertainties throughout the measurement process; and 3) continuously monitoring the performance and 

state of statistical control of the measurement process with proven statistical process control techniques 

including the measurement of well-characterized check standards along with the normal workload and the 

use of appropriate control charts.

1.5.13 

measurement uncertainty

uncertainty of measurement

uncertainty

Non-negative parameter characterizing the dispersion of the quantity values being attributed to a 

measurand, based on the information used. 

NOTE 1 Measurement uncertainty includes components arising from systematic effects, such as components 

associated with corrections and the assigned quantity values of measurement standards, as well as the definitional 

uncertainty. Sometimes estimated systematic effects are not corrected for but, instead, associated measurement 

uncertainty components are incorporated.

NOTE 2 The parameter may be, for example, a standard deviation called standard measurement uncertainty (or a 

specified multiple of it), or the half-width of an interval, having a stated coverage probability. 

NOTE 3 Measurement uncertainty comprises, in general, many components. Some of these may be evaluated by 

Type A evaluation of measurement uncertainty from the statistical distribution of the quantity values from series of 

measurements and can be characterized by standard deviations. The other components, which may be evaluated by 

Type B evaluation of measurement uncertainty, can also be characterized by standard deviations, evaluated from 

probability density functions based on experience or other information.

NOTE 4 In general, for a given set of information, it is understood that the measurement uncertainty is associated 

with a stated quantity value attributed to the measurand. A modification of this value results in a modification of the 

associated uncertainty.

[JCGM 200:2012 2.26] 

1.5.14 

metrological traceability

Property of a measurement result whereby the result can be related to a reference through a documented 

unbroken chain of calibrations, each contributing to the measurement uncertainty. 

[JCGM 200:2012 2.41] 

NOTE: The abbreviated term “traceability” is sometimes used to mean ‘metrological traceability’ as well as other 

concepts, such as ‘sample traceability’ or ‘document traceability’ or ‘instrument traceability’ or ‘material 

traceability’, where the history (“trace”) of an item is meant. Therefore, the full term of “metrological traceability” is 

preferred if there is any risk of confusion.

[NOTE 8 from JCGM 200:2015 2.41]

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1.5.15 

nonconformity

Nonfulfillment of NVLAP requirements for accreditation. 

1.5.16 

NVLAP Lab Code

Unique numeric identifier that is assigned by NVLAP to each laboratory and used for identification, 

record-keeping, and database management. (See also Annex A.)

1.5.17 

NVLAP logo

The graphic version of the NVLAP acronym. Use of the NVLAP logo alone is reserved for NVLAP. 

Accredited laboratories are permitted to use the NVLAP logo only as part of the NVLAP symbol. (See 

also NVLAP symbol and Annex A.)

1.5.18 

NVLAP symbol

The NVLAP logo combined with the NVLAP Lab Code and type of accreditation activity (testing or 

calibration). The NVLAP symbol is the graphical representation that an accredited laboratory is permitted 

to use in referencing its accredited status. (See also NVLAP logo and Annex A.)

1.5.19 

objective evidence

Data supporting the existence or verity of something.

[ISO 9000:2015, 3.8.3] 

NOTE Objective evidence may be obtained through observation, measurement, test, or other means.

1.5.20 

proficiency testing

Evaluation of participant performance against pre-established criteria by means of interlaboratory 

comparisons. 

NOTE 1 For the purposes of this International Standard, the term “proficiency testing” is taken in its widest sense 

and includes, but is not limited to:

a) quantitative scheme — where the objective is to quantify one or more measurands of the proficiency test item;

b) qualitative scheme — where the objective is to identify or describe one or more characteristics of the 

proficiency test item;

c) sequential scheme — where one or more proficiency test items are distributed sequentially for testing or

measurement and returned to the proficiency testing provider at intervals;

d) simultaneous scheme — where proficiency test items are distributed for concurrent testing or measurement 

within a defined time period;

e) single occasion exercise — where proficiency test items are provided on a single occasion;

f) continuous scheme — where proficiency test items are provided at regular intervals;

g) sampling — where samples are taken for subsequent analysis; and

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h) data transformation and interpretation — where sets of data or other information are furnished and the

information is processed to provide an interpretation (or other outcome).

[ISO/IEC 17043:2010, 3.7] 

1.5.21 

quality management system

Part of a management system with regard to quality. 

[ISO 9000:2015, 3.5.4] 

1.5.22 

quality manual

Specification for the quality management system of an organization. 

NOTE 1 to entry: Quality manuals can vary in detail and format to suit the size and complexity of an individual

organization.

[ISO 9000:2015, 3.8.8] 

1.5.23 

requirement

Provision that conveys criteria to be fulfilled.

[ISO/IEC Guide 2:2004, 7.5] 

NOTE NVLAP requirements are mandatory and must be fulfilled to achieve and maintain accreditation. NVLAP 

requirements are contained in NIST Handbook 150, NIST Handbook 150-xx series, NVLAP Policy Guides, and 

NVLAP Laboratory Bulletins.

1.5.24 

revocation 

Removal of the accredited status of a laboratory if the laboratory is found to have violated the conditions 

for accreditation.

1.5.25 

Scope of Accreditation

Document issued by NVLAP to a laboratory that has been granted NVLAP accreditation. The Scope of 

Accreditation lists the test methods or services, or calibration services, for which the laboratory is 

accredited. (See also Certificate of Accreditation.)

1.5.26 

suspension

Temporary removal by NVLAP of the accredited status of a laboratory for all or part of its scope of 

accreditation when it is determined (by the laboratory or by NVLAP) that the laboratory does not meet 

the conditions for accreditation. 

1.5.27 

test method

Defined technical procedure to determine one or more specified characteristics of a material or product.

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1.6 NVLAP information

NVLAP makes publicly available the following information through its website, 

http://www.nist.gov/nvlap: 

a) a description of the NVLAP program and the fields of accreditation offered by NVLAP; 

b) the documents that set out the requirements for accreditation, including NIST Handbook 150, the 

NIST Handbook 150-series of program-specific handbooks, and their associated guides and 

bulletins (see also Clause 4);

c) information about the assessment and accreditation processes;

d) information about suitable ways to obtain traceability of measurement results in relation to the 

scope for which accreditation is provided; 

e) the NVLAP fee policy and schedule;

f) a directory of NVLAP-accredited laboratories, which includes the name and address, accreditation 

effective and expiration dates, and scope of accreditation of each accredited laboratory;

g) information about mutual recognition arrangements to which NVLAP is a signatory; 

h) an analysis of NVLAP’s relationship with related bodies (including NIST); 

i) various publications and forms for the use and benefit of accredited laboratories, NVLAP assessors 

and technical experts, and other interested parties.

1.7 Confidentiality

1.7.1 To the extent permitted by applicable laws, NVLAP will protect the confidentiality of all 

information obtained relating to the application, on-site assessment, proficiency testing, evaluation, and 

accreditation of laboratories.

1.7.2 In addition, NVLAP and the laboratory seeking accreditation acknowledge and agree that the 

accreditation assessments and proficiency testing activities conducted by NVLAP are done in accordance 

with the authority granted to NIST by Title 15 United States Code Section 3710a. NVLAP and the 

laboratory further agree that to the extent permitted by law, NIST will protect information obtained during 

application, on-site assessment, proficiency testing, evaluation, and accreditation from disclosure pursuant 

to Title 15 USC 3710a(c)(7)(A) and (7)(B) for a period of five years after it is obtained. 

1.7.3 For the first five years that laboratory information is held by NVLAP, the provisions of 1.7.1 and 

1.7.2 will be in force. Information in NVLAP’s possession for more than five years will continue to be 

held in confidence under the provisions of 1.7.1. 

1.8 Referencing NVLAP accreditation

1.8.1 The term NVLAP and the NVLAP logo are registered marks of the Federal Government, which 

retains exclusive rights to control the use thereof. Permission to use the term and symbol (see 1.5.18) is 

granted to NVLAP-accredited laboratories for the limited purpose of announcing their accredited status, 

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and for use on reports that describe only testing or calibration within the scope of accreditation. NVLAP 

reserves the right to control the quality of the use of the NVLAP term, logo, and symbol. 

1.8.2 NVLAP’s policy is to control the use of the term and symbol and to ensure that accredited 

laboratories express their accredited status in a manner that is clear and accurate, and not misleading. This 

policy applies to test and calibration reports, letterheads, contracts, business cards, brochures, advertising, 

websites, and any other use not specified herein. 

1.8.3 NVLAP-accredited laboratories are authorized to use the term NVLAP and the NVLAP symbol to 

reference their accredited status, subject to the conditions presented in Annex A. Failure to comply with 

the conditions may result in suspension or revocation of a laboratory’s accreditation. 

1.8.4 Use of the term or logo by other persons and organizations shall be authorized in writing by 

NVLAP on a case-by-case basis.

1.8.5 Use of the term and symbol by a laboratory whose status is suspended, revoked, or voluntarily 

terminated is specified in 3.10, 3.11, and 3.12. 

1.8.6 NVLAP has established procedures for taking suitable action to deal with incorrect references to 

accreditation status or misleading use of accreditation symbols.

1.9 Mutual recognition

1.9.1 NVLAP maintains signatory member status in several Mutual Recognition Arrangements 

(MRAs), including the International Laboratory Accreditation Cooperation (ILAC) MRA. MRAs serve to 

demonstrate the equivalence of the operation of signatory member accreditation bodies. As a 

consequence, the competence (within the accredited scopes) of laboratories accredited by these bodies is 

demonstrated and recognized by all signatory accreditation bodies. Through MRAs, NVLAP actively 

promotes the worldwide acceptance of test reports and calibration certificates from NVLAP-accredited 

laboratories. Links to the texts of the MRAs are given on the NVLAP website.

1.9.2 As a signatory to the ILAC MRA, NVLAP meets the requirements of ISO/IEC 17011, and 

specific supplementary MRA requirements. In accordance with the MRA, NVLAP-accredited 

laboratories meet the requirements of ISO/IEC 17025. 

1.9.3 NVLAP may establish and develop special programs in response to requests from government 

agencies where it has been determined that the subject of accreditation is inherently a government 

function. Some of these programs may not be covered by or subject to the requirements of any MRA. 

NVLAP will clearly identify such programs. 

1.10 Accreditation of laboratories located outside of the United States

NVLAP has established policies and requirements for accreditation of laboratories located outside the 

United States (see Annex D). These policies include the NVLAP commitment to abide by its mutual 

recognition arrangement obligations concerning cross-frontier accreditation activities.

1.11 Complaints

NVLAP employs a formal system to address complaints, which includes procedures for determining the 

validity of complaints, taking appropriate and effective actions, responding to complainants, and recordkeeping. Any person or organization may lodge a complaint regarding the activities of NVLAP or of a 

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NVLAP-accredited laboratory by sending a description of the complaint and supporting documentation to 

NVLAP. A complaint concerning a NVLAP-accredited laboratory should first be addressed by the 

laboratory against which the complaint is lodged. 

2 LAP establishment, development and implementation

2.1 Bases for establishment

2.1.1 General

NVLAP establishes LAPs in response to legislative or administrative actions, or to requests from private 

sector entities or government agencies.

2.1.2 LAPs established through legislative or administrative actions

Upon receipt of a mandate for a LAP based on legislative or administrative action, NVLAP publishes a 

Federal Register notice stating the purpose and general scope of the LAP and identifying government 

agencies having oversight. The notice provides information to any interested party wishing to receive 

routine information on the development of the LAP.

2.1.3 LAPs established by request

2.1.3.1 A request to establish a LAP must be made in writing to the Chief of NVLAP. Each request must 

include: 

a) the scope of the LAP in terms of services proposed for inclusion; 

b) specific identification of the applicable standards or test methods, including appropriate 

designations, and the organizations having responsibility for them; 

c) a statement of the perceived need for the LAP;

d) an estimate of the anticipated demand for the program, including the number of laboratories that 

are likely to seek accreditation and the number and nature of the users of such laboratories;

e) a statement of the extent to which the requestor will support necessary developmental aspects of 

the LAP with funding and personnel. 

2.1.3.2 If the requestor is a federal, state, or local government agency, then the request should also 

include a description of the procedures followed or a citation of the specific authority used to identify a 

need for the LAP. For state and local government agencies, the request should also include a statement 

explaining why the LAP should be of national scope. 

2.1.3.3 If the requestor is a private sector entity, then the request should also include a description of the 

process by which the request was developed (e.g., public meetings representing a balance of interests or 

input from interested parties).

2.1.3.4 NVLAP may request clarification of the information submitted in the request. 

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2.1.3.5 The Chief of NVLAP analyzes the request and any supporting information received, and after 

consultation with interested parties through public workshops or other means to ensure open participation, 

determines if there is need for the requested LAP.

2.1.3.6 The Chief of NVLAP decides whether or not to develop the LAP, taking into consideration the 

demonstrated need or available resources.

2.1.3.7 The Chief of NVLAP informs the requestor and other interested parties of the LAP decision.

2.2 Development of technical requirements

2.2.1 Technical requirements for accreditation are specific for each LAP. They tailor the general 

requirements for accreditation to the services covered by the LAP.

2.2.2 NVLAP develops the technical requirements based on relevant and impartial expert advice, 

ensuring that all interested parties have the opportunity for effective involvement. This advice may be 

obtained directly through public workshops or other suitable means. 

2.2.3 When NVLAP organizes workshops or other means of collecting input, it provides the 

opportunity for all interested parties to attend and/or respond. One means typically used is announcing 

such activities in the Federal Register. A summary of each workshop is prepared and made available 

upon request. 

2.2.4 When any part of the development of technical requirements is sponsored or undertaken by 

another organization, NVLAP ensures that the same conditions for balanced representation and 

participation are fulfilled. 

2.2.5 NVLAP communicates and consults with appropriate officials from those federal agencies that 

may have an interest in and may be affected by established LAPs, facilitating their effective and 

meaningful cooperation, input, and participation. 

2.3 Announcing the establishment of a LAP

When NVLAP has completed the development of the technical requirements, it announces the 

establishment of the LAP, advising laboratories how to apply for accreditation. 

2.4 Adding to or modifying a LAP 

2.4.1 A LAP may be added to, modified, or realigned based on either a written request or a need 

identified by NVLAP. Any person wishing to add or delete specific tests or calibrations, types of tests or 

calibrations, or standards may submit a request to NVLAP.

2.4.2 NVLAP may choose to make additions or modifications available for accreditation in a LAP 

when: 

a) the additional tests or calibrations, types of tests or calibrations, or standards requested are directly 

relevant to the LAP;

b) it is feasible and practical to accredit testing or calibration laboratories for the additional tests or 

calibrations, types of tests or calibrations, or standards;

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c) it is likely that laboratories will seek accreditation for the additional tests or calibrations, types of 

tests or calibrations, or standards. 

2.4.3 The process for modifying a LAP depends on the nature of the modification. Significant changes 

to a LAP may be subject to a process similar to that described in 2.2. Minor changes (e.g., addition of 

methods for technologies already included in a LAP) may be handled in a less formal manner.

2.4.4 NVLAP gives due notice of any changes to its requirements for accreditation. Laboratories are 

required to meet any additional requirements within announced time frames. 

2.5 Termination of a LAP 

2.5.1 The Chief of NVLAP may terminate a LAP when he/she determines that a need no longer exists 

to accredit laboratories for the services covered under the scope of the LAP.

The Chief of NVLAP may solicit comments on the proposed termination if he/she determines that input 

from interested parties is necessary.

In the event that the Chief of NVLAP decides to terminate a LAP, a notice will be published in the 

Federal Register setting forth the basis for that determination. 

2.5.2 When a LAP is terminated, NVLAP will no longer grant or renew accreditations following the 

effective date of termination. Accreditations previously granted remain effective until their expiration 

date unless terminated voluntarily by the laboratory or revoked by NVLAP. Technical expertise is 

maintained by NVLAP while any accreditation remains effective.

3 Accreditation process

3.1 Application for accreditation

3.1.1 General

A laboratory may apply for accreditation in any of the established LAPs. In order to initiate the 

accreditation process, the applicant laboratory shall submit a completed application along with required 

documentation, agree to conditions for accreditation, and pay all required fees. 

3.1.2 Required documentation

3.1.2.1 An applicant laboratory shall complete an application for accreditation that includes, but is not 

limited to, the following information:

a) the legal name and full address of the laboratory;

b) the ownership of the laboratory; 

c) the Authorized Representative’s name and contact information;

d) the names, titles and contact information for laboratory staff nominated to serve as Approved 

Signatories of test or calibration reports that reference NVLAP accreditation;

e) accreditation history, i.e., current accreditations with other accreditation bodies. 

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3.1.2.2 The laboratory shall submit the following documentation with the application:

a) an organizational chart defining relationships that are relevant to performing testing and 

calibrations covered in the accreditation request;

b) a general description of the laboratory, including its facilities and scope of operation;

c) the requested scope of accreditation;

d) quality manual and related management system documentation, as well as records of the latest 

internal audit and management review. 

3.1.3 Conditions for accreditation

By signing the application, the laboratory’s Authorized Representative attests that the information in the 

application is correct and commits the laboratory to fulfill the conditions for accreditation listed in 

Annex C of this handbook, including attestation that the laboratory has an official copy of ISO/IEC 

17025. 

3.1.4 Fees for accreditation

NVLAP operates on a cost-reimbursable basis from fees paid by participating laboratories. The NVLAP 

website includes a description of the fee structure and fee refund policy. The fees are reviewed annually 

and adjusted as necessary.

3.1.5 Review of application 

Upon receipt of a laboratory’s application for accreditation, NVLAP assigns a NVLAP Lab Code to the 

applicant laboratory; requests further information, if necessary; and specifies the next step(s) in the 

accreditation process.

3.2 Management system review 

3.2.1 Assignment of assessor(s)

3.2.1.1 NVLAP selects and qualifies assessors on the basis of their education, work experience, technical 

knowledge, training, assessment experience, and communication and interpersonal skills.

3.2.1.2 NVLAP uses assessors to evaluate all information collected from an applicant laboratory and to 

conduct the assessment on NVLAP’s behalf at the laboratory and any other sites where activities to be 

covered by the accreditation are performed.

3.2.1.3 Assessors are assigned to conduct an on-site assessment of a particular laboratory on the basis of 

how well their knowledge and experience match the scope of testing or calibration to be assessed. 

NVLAP provides the laboratory with a short biographical sketch of each assessor. The laboratory may 

object to the assignment of any particular assessor if a conflict of interest or prior business relationship 

exists.

3.2.2 Document and record review

3.2.2.1 The assigned assessor(s) reviews the laboratory’s quality manual and related management system 

documentation submitted with the application to ensure that all aspects of the management system are 

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addressed and satisfy the requirements in this handbook. The assessor may ask for additional management 

system documents and/or records in order to facilitate the review.

3.2.2.2 The assessor may identify nonconformities during the document and record review. The assessor 

informs the Authorized Representative in writing of any nonconformities found. NVLAP may require that 

the laboratory address the nonconformities before the on-site assessment is scheduled. When the 

management system documentation requires significant revision, NVLAP may require that the laboratory 

improve its documentation and submit it for further review prior to proceeding with the accreditation 

process.

3.2.3 Preparation for on-site assessment

3.2.3.1 The assessor contacts the laboratory to schedule a mutually acceptable date for the on-site 

assessment. An assessment normally takes one to five days depending on the proposed scope of 

accreditation. Every effort is made to conduct an assessment with as little disruption as possible to the 

normal operations of the laboratory.

3.2.3.2 If a laboratory requires that its established assessment date be changed, it shall contact the 

assessor(s). The laboratory is responsible for any costs associated with the date change.

3.2.3.3 Following initial accreditation, NVLAP will conduct an on-site assessment during the first year of 

accreditation and every two years thereafter. Delay of assessments beyond these intervals may affect a 

laboratory’s accreditation status.

3.2.3.4 An on-site assessment is conducted at all laboratory premises where tests or calibrations are 

performed. When tests or calibrations are performed at locations other than laboratory premises, NVLAP 

will determine the process for assessing these activities. The process may include observing tests or 

calibrations performed at these locations. 

3.2.3.5 NVLAP may elect to conduct a preassessment of a laboratory if it determines that such a visit 

would be useful to evaluate the laboratory’s preparedness for the assessment stage of the accreditation 

process.

3.3 On-site assessment

3.3.1 Conduct of on-site assessment

3.3.1.1 Assessors use checklists provided by NVLAP so that each laboratory receives an assessment 

comparable to that received by others. Checklists are normative documents that include the requirements 

outlined in NIST Handbook 150 and the NIST Handbook 150-xx series.

3.3.1.2 At the beginning of the assessment, the assessor(s) conducts an opening meeting with 

management and laboratory personnel to explain the purpose of the on-site assessment, clearly define the 

accreditation criteria, and confirm the assessment schedule and the requested scope of accreditation. 

3.3.1.3 During the assessment, the assessor(s) gathers objective evidence to verify the laboratory’s 

competence for the requested scope of accreditation. These activities may include examining the

management system, reviewing quality and technical records, examining equipment and facilities, 

interviewing staff, and observing demonstrations of testing or calibrations. 

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3.3.1.4 In order to conduct an appropriate assessment of competence, the assessor requires access to 

laboratory records for all staff members who routinely perform or affect the quality of the testing or 

calibration for which accreditation is sought. This includes resumes, job descriptions of key personnel, 

training, and competency evaluations. The assessor need not be given information that violates individual 

privacy, such as salary, medical information, or performance reviews outside the scope of the 

accreditation program.

3.3.1.5 At the conclusion of the assessment, the assessor conducts a closing meeting to discuss 

observations and any nonconformities with the Authorized Representative and other responsible 

laboratory staff. During the meeting, the laboratory has the opportunity to ask questions about the 

findings, including nonconformities, if any, and their basis. 

3.3.2 Analysis and notification of findings

The assessor informs the laboratory of nonconformities during the on-site assessment and documents the 

nonconformities in the on-site assessment report.

3.3.3 On-site assessment report

3.3.3.1 At the closing meeting, the assessor submits a written report on the conformance of the laboratory 

with the accreditation requirements. The report includes as a minimum:

a) date(s) of assessment;

b) the names of the assessor(s) responsible for the report;

c) the names and addresses of all the laboratory locations assessed; 

d) the assessed scope of accreditation or reference thereto;

e) comments and/or nonconformities cited by the assessor(s) on the compliance of the laboratory with 

the accreditation requirements; 

f) a copy of completed checklists.

3.3.3.2 The Authorized Representative signs the report to acknowledge that the assessor has discussed its 

content and agrees to respond to NVLAP regarding resolution of nonconformities within 30 days (see 

3.3.4).

3.3.3.3 The assessor forwards the original report to NVLAP and leaves a copy with the laboratory.

3.3.3.4 NVLAP is responsible for the content of the on-site assessment report, including the stating of 

nonconformities. 

3.3.4 Resolution of nonconformities

3.3.4.1 A laboratory shall respond in writing to NVLAP within 30 days of the date of the on-site 

assessment report, addressing all documented nonconformities. The response shall be signed by the 

Authorized Representative and shall include documentation that the specified nonconformities have been 

corrected.

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3.3.4.2 All nonconformities shall be satisfactorily resolved before initial accreditation may be granted. If 

resolution is expected to take longer than 30 days, the laboratory may submit a corrective action plan in 

its initial response, which typically includes a list of actions, target completion dates, and names of 

persons responsible for discharging those actions. 

The laboratory shall supply evidence that clearly demonstrates that the actions taken have fully resolved 

the nonconformities. If the laboratory’s responses are found to be insufficient, NVLAP may request 

further information. 

3.3.4.3 The laboratory may ask for clarification of a nonconformity from either the assessor during the 

closing meeting or NVLAP at any time. A laboratory may also challenge the validity of a nonconformity 

by writing to NVLAP.

3.3.4.4 If substantial nonconformities are cited, NVLAP may require an additional on-site assessment, at 

additional cost to the laboratory, prior to granting accreditation. All nonconformities and resolutions will 

be subject to thorough review and evaluation prior to the accreditation decision (see 3.5). 

3.4 Proficiency testing

3.4.1 General

3.4.1.1 Proficiency testing, along with document review and on-site assessment, is an integral part of the 

NVLAP accreditation process. The performance of tests or calibrations and reporting of results from 

proficiency testing assists NVLAP with determining a laboratory’s competence and the effectiveness of 

its management system. Information obtained from proficiency testing helps to identify technical 

problems in a laboratory and assists in maintaining the quality of laboratory performance. 

3.4.1.2 NVLAP uses proficiency testing programs that are consistent with the requirements contained in 

ISO/IEC 17043, Conformity assessment – General requirements for proficiency testing, where applicable. 

Proficiency testing may be coordinated by NVLAP itself or by an external provider of proficiency testing 

services.

3.4.1.3 Where applicable, requirements regarding the minimum level and frequency of participation in 

proficiency testing by accredited laboratories and other information about proficiency testing programs 

are provided in NVLAP’s program-specific documentation. 

3.4.2 Types of proficiency testing

3.4.2.1 Proficiency testing requirements are associated with most fields of accreditation. Proficiency 

testing techniques vary depending on the nature of the test item, the method in use, and the number of 

laboratories participating. For examples of types of proficiency testing, see Note 1 of 1.5.21. 

3.4.2.2 Proficiency testing using interlaboratory comparisons may utilize randomly selected specimens 

from a batch of uniform material, selected specimens with known properties and results, artifacts with 

similar properties that have not been characterized, and one-of-a-kind artifacts.

3.4.2.3 Proficiency testing for calibration laboratories may involve comparison of the results of 

measurements made by the laboratory on selected instruments or artifacts with calibration results obtained 

independently by NVLAP. 

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3.4.3 Analysis and reporting

NVLAP reviews proficiency testing data as part of the accreditation assessment and decision-making 

process. For proficiency testing programs organized by NVLAP, each participant’s own results are 

reported only to them. Summary results are available upon request to interested parties (e.g., professional 

societies and standards-writing bodies); however, the identity and performance of individual laboratories 

are kept confidential.

3.4.4 Proficiency testing nonconformities

3.4.4.1 Unsatisfactory participation in any NVLAP proficiency testing program is a nonconformity. 

Proficiency testing nonconformities are defined as, but not limited to, one or more of the following: 

a) failure to meet specified proficiency testing performance requirements prescribed by NVLAP;

b) failure to participate in a regularly scheduled “round” of proficiency testing for which the 

laboratory has received instructions and/or materials;

c) failure to produce acceptable test or calibration results when using materials or artifacts whose 

properties are well-characterized and known to NVLAP. 

3.4.4.2 NVLAP notifies the laboratory of proficiency testing nonconformities and actions to be taken to 

resolve the nonconformities. Failure to resolve proficiency testing nonconformities will result in denial or 

suspension of accreditation.

3.5 Accreditation decision 

3.5.1 The Chief of NVLAP is responsible for all NVLAP accreditation actions, including granting, 

renewing, suspending, and revoking any NVLAP accreditation. 

3.5.2 NVLAP evaluates the information gathered during the accreditation process, including:

a) information provided on the application; 

b) results of management system documentation review;

c) on-site assessment reports;

d) actions taken by the laboratory to correct nonconformities; 

e) results of proficiency testing, if required.

3.5.3 Based on this evaluation, NVLAP makes the decision whether or not to accredit the laboratory. If 

the evaluation reveals nonconformities beyond those identified in the assessment process, NVLAP 

informs the laboratory in writing of the nonconformities. The laboratory shall respond as specified in 

3.3.4. All nonconformities must be resolved to NVLAP’s satisfaction before accreditation can be granted.

NOTE In the event that NVLAP determines accreditation cannot be granted, the laboratory has the right to appeal 

that decision (see 3.13).

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3.6 Granting accreditation 

3.6.1 NVLAP grants initial accreditation when a laboratory has met all NVLAP criteria for 

accreditation. One of four accreditation renewal dates (January 1, April 1, July 1, or October 1) is 

assigned to the laboratory and is usually retained as long as the laboratory remains in the program. 

NVLAP accreditation is valid from the date of granting accreditation to the assigned renewal date. If 

accreditation is not renewed by the laboratory prior to the renewal date, the accreditation will expire.

3.6.2 When accreditation is granted, NVLAP provides a Certificate of Accreditation and a Scope of 

Accreditation to the laboratory.

3.6.3 The accreditation documents include the following information: 

a) the name and address of the laboratory that has been accredited; 

b) the laboratory’s Authorized Representative;

c) the effective and the expiration dates of the accreditation;

d) the NVLAP Lab Code.

3.6.4 The scope of accreditation shall also identify: 

a) the tests or calibrations, or types of tests or calibrations, for which accreditation has been granted, 

b) for calibrations, the calibration and measurement capability (CMC) expressed as:

— measurand or reference material;

— calibration/measurement method/procedure and/or type of instrument/material to be 

calibrated/measured;

— measurement range and additional parameters where applicable, e.g., frequency of applied 

voltage;

— uncertainty of measurement.

c) for tests, the materials or products tested, the methods used, and the tests performed. 

NOTE: Refer to ILAC P14, Clause 5 for additional information on calibration scopes of accreditation.

3.7 Renewal of accreditation

3.7.1 Each accredited laboratory receives a renewal notification before the expiration date of its 

accreditation to allow sufficient time to complete the renewal process.

3.7.2 Fees for renewal are charged according to services required as listed on the NVLAP website.

3.7.3 Both the required information and fees shall be received by NVLAP prior to expiration of the 

laboratory’s current accreditation to avoid a lapse in accreditation.

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3.7.4 On-site assessments of currently accredited laboratories are performed in accordance with the 

procedures in 3.2 and 3.3. If nonconformities are found during the assessment of an accredited laboratory, 

the laboratory must submit a satisfactory response concerning resolution of nonconformities within 

30 days of notification. 

3.7.5 Should resolution take longer than 30 days, the laboratory’s accreditation may be subject to 

adverse action. In those cases where nonconformities do not directly affect the results of tests or 

calibrations, NVLAP, at its discretion, may accept a plan of corrective action as satisfactory resolution. 

When this occurs, laboratories are expected to submit sufficient objective evidence (see 1.5.20) to 

demonstrate that the nonconformities have been resolved according to the plan. 

3.7.6 Undue delay in the resolution of nonconformities may necessitate another on-site assessment at 

additional cost to the laboratory. 

3.8 Monitoring visits 

3.8.1 In addition to regularly scheduled assessments, NVLAP may conduct monitoring visits at any 

time during the accreditation period. They may occur for cause or on a random selection basis. While 

most monitoring visits will be scheduled in advance with the laboratory, NVLAP may conduct 

unannounced monitoring visits. 

3.8.2 The scope of a monitoring visit may range from checking a few designated items to a complete 

assessment; for example, the assessors may review nonconformity resolutions; verify reported changes in 

the laboratory’s personnel, facilities, or operations; administer proficiency testing; or investigate 

complaints, when appropriate.

3.9 Changes to scope of accreditation 

A laboratory may request in writing changes to its scope of accreditation. If the laboratory requests 

additions to its scope, it shall meet all NVLAP requirements for the additional tests or calibrations, types 

of tests or calibrations, or standards. NVLAP determines the need for an additional on-site assessment 

and/or proficiency testing on a case-by-case basis.

A laboratory may also request deletions from its scope of accreditation. The deletions may be temporary 

(see 3.10) or permanent.

3.10 Suspension of accreditation

3.10.1 NVLAP may suspend an accredited laboratory’s accreditation if there is evidence that the 

laboratory has persistently failed to comply with the criteria for accreditation; e.g., evidence obtained 

during the assessment process, or the laboratory’s notification to NVLAP of a major change [see 

Annex C, item h)]. Suspension can be for all or part of a laboratory’s accreditation. Depending on the 

nature of the issues involved, NVLAP may also propose to revoke accreditation (see 3.11). 

3.10.2 If a laboratory’s accreditation is suspended, NVLAP notifies the laboratory of that action, stating 

the reasons for and conditions of the suspension and specifying the action(s) the laboratory must take to 

have its accreditation reinstated. A reassessment of the laboratory may also be required for reinstatement.

3.10.3 A suspended laboratory shall refrain from using the NVLAP symbol in the area(s) affected by the 

suspension. When issues that led to the suspension are resolved, NVLAP will reinstate the laboratory’s 

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accreditation and authorize the laboratory to resume testing or calibration activities in the previously 

suspended area(s) as an accredited laboratory. 

3.11 Revocation of accreditation 

3.11.1 If NVLAP proposes to revoke the accreditation of a laboratory, the NVLAP Chief informs the 

laboratory of the reasons for the proposed revocation and the procedure for appealing such a decision. 

Revocation can be for all or part of a laboratory’s scope of accreditation. NVLAP may give the laboratory 

the option of voluntarily terminating the accreditation (see 3.12). 

3.11.2 The laboratory has 30 days from the date of receipt of the proposed revocation letter to appeal the 

decision (see 3.13). The proposed revocation becomes final through the issuance of a written decision to 

the laboratory in the event that the laboratory does not appeal the proposed denial or revocation within the 

30-day period. 

3.11.3 A laboratory whose accreditation has been revoked shall cease use of the NVLAP symbol on any 

of its test or calibration reports, correspondence, or advertising related to the area(s) affected by the 

revocation. If the revocation affects only some, but not all of the items listed on a laboratory’s Scope of 

Accreditation, NVLAP will issue a revised scope that excludes the revoked area(s).

3.11.4 A laboratory whose accreditation has been revoked, may reapply for accreditation and complete 

the assessment and evaluation process (see 3.1 to 3.6). 

3.12 Voluntary termination of accreditation 

3.12.1 A laboratory may request to terminate its accreditation by advising NVLAP in writing.

3.12.2 Upon receipt of a request for termination, NVLAP will terminate the laboratory’s accreditation, 

notify the laboratory that its accreditation has been terminated, and instruct the laboratory to remove the 

NVLAP symbol from all test and calibration reports, correspondence, and advertising. 

3.12.3 A laboratory whose accreditation has been voluntarily terminated may reapply for accreditation 

and complete the assessment and evaluation process (see 3.1 to 3.6).

3.13 Appeals

3.13.1 A laboratory has the right to appeal any adverse decision made by NVLAP related to its 

accreditation status. Such decisions include refusal to accept an application; refusal to proceed with an 

assessment; corrective action requests; changes in scope of accreditation; decision to deny, suspend, or 

revoke accreditation; and any other action that impedes the attainment of accreditation. The laboratory 

submits its appeal in writing to NVLAP.

3.13.2 Appeals are handled by the next higher level in the organization. Appeals of decisions made by 

NVLAP Program Managers (e.g., acceptance of an application, corrective action requests) are handled by 

the NVLAP Chief. Appeals of decisions made by the NVLAP Chief (e.g., final accreditation, revocation 

of accreditation) are handled by the Director of NIST. In some cases, a qualified technical expert(s), who 

is independent of the subject of appeal, may be called to investigate an appeal.

3.13.3 The person(s) assigned to investigate the appeal decides on the validity of the appeal and, if 

appropriate, renders a recommendation. NVLAP advises the appellant of the outcome of these 

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deliberations and any recourse for further appeal. If the laboratory appeals a decision to the Director of 

NIST, the adverse decision will be stayed pending the outcome of the appeal.

4 Criteria for accreditation

4.1 General

4.1.1 The NVLAP criteria for accreditation are made up of several documents: 

a) the NVLAP conditions for accreditation (see Annex C);

b) the conformity assessment standard, ISO/IEC 17025, General requirements for the competence of 

testing and calibration laboratories, which sets out the general requirements for the accreditation 

of testing and calibration laboratories; 

c) the NIST Handbook 150 series of handbooks, which provide additional requirements, guidance, 

and interpretive information applicable to specific NVLAP laboratory accreditation programs 

(LAPs).

4.1.2 The NVLAP conditions for accreditation and the NIST Handbook 150 series of handbooks are 

available for download from the NVLAP website http://www.nist.gov/nvlap. The ISO/IEC 17025 

standard is not supplied by NVLAP. Each applicant and accredited laboratory shall have an official copy 

of this standard from a legitimate source. 

4.1.3 In between the formal revisions of NIST Handbook 150, NVLAP may publish NVLAP Policy 

Guides to augment NIST Handbook 150 and give notice of any changes on the requirements for 

accreditation. A Policy Guide may set forth new, or clarify existing, general policies, procedures, and 

requirements. The content of a NVLAP Policy Guide supersedes any previous criteria where indicated.

4.2 NVLAP program-specific requirements

4.2.1 Program-specific handbooks contain the technical requirements, guidance, and interpretations 

that are specific to each field of accreditation for which NVLAP offers accreditation. 

4.2.2 NVLAP may publish NVLAP Lab Bulletins, as needed, to provide additional information relating 

to a specific LAP, including program additions and changes, or to clarify program-specific requirements. 

The additions or changes to a program that are published in a NVLAP Lab Bulletin supersede the 

requirements of the currently published handbook until such time as the additions or changes are 

published in a revision of the handbook. 

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Annex A

(normative)

Referencing NVLAP accreditation

A.1 General

The term NVLAP and the NVLAP logo are registered marks of the Federal Government, which retains 

exclusive rights to control the use thereof. Permission to use the term and symbol (see 1.5.19) is granted 

to NVLAP-accredited laboratories for the limited purpose of announcing their accredited status, and for 

use on reports that describe only testing or calibration within the scope of accreditation. NVLAP reserves 

the right to control the quality of the use of the NVLAP term, logo, and symbol. 

The NVLAP symbol clearly indicates the activity to which the accreditation is related through 

incorporation of the unique NVLAP Lab Code and the word “testing” or “calibration.” 

The procedures for the use of the Combined ILAC MRA Mark by accredited laboratories within the scope 

of the ILAC MRA are set out in Annex E.

A.2 Conditions for referencing NVLAP accreditation

In order to become and remain accredited, laboratories shall comply with the following conditions 

pertaining to the use of the term NVLAP, the NVLAP logo, and NVLAP symbol. Failure to comply with 

these conditions may result in suspension or revocation of a laboratory’s accreditation.

a) An accredited laboratory shall have a policy and procedure for controlling the use of the term 

NVLAP and the NVLAP symbol. The procedure shall be unique and include actions to be taken 

specific to the laboratory.

b) An applicant laboratory that has not yet achieved accreditation may make reference to its applicant 

status. If the NVLAP Lab Code is used, it shall be accompanied by a statement accurately 

reflecting the laboratory’s status. An applicant laboratory shall not use the NVLAP logo or symbol. 

c) The term and/or symbol shall not be used in a manner that brings NVLAP into disrepute or 

misrepresents a laboratory’s scope of accreditation or accredited status.

d) When the term NVLAP is used to reference a laboratory’s accredited status, it shall be accompanied 

by the NVLAP Lab Code. 

e) The use of the NVLAP term and/or symbol on a laboratory’s test or calibration reports shall be 

limited to the specific location(s), site(s), or field activity(ies) as identified on the scope of the 

accreditation.

f) A test or calibration report bearing the term and/or symbol shall include a statement that the report 

must not be used by the client to claim product certification, approval, or endorsement by NVLAP, 

NIST, or any agency of the U.S. Government. 

g) A laboratory shall not use the terms certified or registered when referencing its NVLAP 

accreditation or its conformance to ISO/IEC 17025. The correct term is accredited. 

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h) When an accredited laboratory uses the term and/or symbol in a contract or proposal, the laboratory 

shall reference its current accreditation status and provide a copy of, or link to its scope of 

accreditation.

A.3 Reproduction of NVLAP symbol

A.3.1 The following rules shall apply when a laboratory uses the NVLAP symbol to reference its 

accredited status.

a) The type of activity (testing or calibration) and the NVLAP Lab Code shall appear below and in 

close proximity to the logo (Fig. 1). The width of the caption shall not exceed the width of the logo 

itself. 

b) The symbol shall stand by itself and shall not be combined with any other logo, symbol, or graphic. 

As an exception to this rule, the NVLAP symbol may be used in combination with the ILAC MRA 

Mark by accredited laboratories under the provisions set forth in Annex E.

c) The aspect ratio (width to height) of the NVLAP logo shall be 2.25 to 1. 

d) The symbol shall be of a size that allows the caption ( type of activity and NVLAP Lab Code) to be 

easily read. 

e) The symbol may be filled or unfilled. In the case of a filled symbol, the same color shall be used 

for the outline and the fill. 

NOTE Electronic copies of the NVLAP logo are available from NVLAP upon request.

A.4 Approved signatories 

The name of at least one Approved Signatory shall appear on a test or calibration report that displays the 

NVLAP symbol or references NVLAP accreditation. A computer-generated report may have the 

Approved Signatory’s name printed along with the test or calibration results, as long as there is evidence 

that there is a system in place to ensure that the report cannot be generated without the review and consent 

of the Approved Signatory. There may be legal or contractual requirements for original signatures to 

appear on the report.

NOTE: NVLAP defines the person(s) who authorizes the test report or calibration certificate as the Approved 

Signatory (see 1.5.2).

A.5 Reporting results not covered by the scope of accreditation

A.5.1 The laboratory may use the term and/or symbol on test or calibration reports when some or all of 

the data are from tests or calibrations performed by the laboratory under its scope of accreditation. The 

laboratory shall not use the term and/or symbol on a report that contains no accredited data. 

A.5.2 A test or calibration report that contains both data covered by the accreditation and data not 

covered by the accreditation shall clearly identify the data that are not covered by the accreditation. The 

report must prominently display the following statement at the beginning of the report: “This report 

contains data that are not covered by the NVLAP accreditation.” 

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A.5.3 If a customer requests an accredited laboratory to generate a test or calibration report based on 

data obtained by another laboratory, the accredited laboratory shall ensure that it is not misrepresenting 

the data as being covered under its accreditation. The test or calibration report shall meet the requirements 

of ISO/IEC 17025:2005, 5.10.2 b), as well as the conditions for referencing NVLAP accreditation found 

in this annex.

A.5.4 The laboratory shall not: issue a test or calibration report that:

a) contains data not generated specifically for the product identified in that report without an 

indication of the original source of the data; or

b) uses the NVLAP term and/or symbol for data from tests not performed by the laboratory. 

When NVLAP obtains any such reports, the laboratory shall be required to apply its procedures for 

control of nonconforming work and take corrective action. Depending on the circumstances, a 

laboratory’s accreditation status may be affected.

A.5.5 The NVLAP symbol shall not be included on correspondence that covers a test or calibration 

report in which none of the results are within the scope of accreditation, or that covers work proposals or 

quotes if none of the work is within the scope of accreditation. 

A.6 Calibration labels on equipment

A.6.1 A laboratory may attach a calibration label containing the NVLAP symbol to an item of 

equipment that it has calibrated provided that the equipment has been calibrated using calibration methods 

covered by the laboratory’s scope of accreditation. 

A.6.2 Calibration labels containing the NVLAP symbol shall not give the impression that NVLAP has 

approved or calibrated the equipment. 

A.6.3 In addition, the calibration label usually includes the following information:

a) the name of the accredited calibration laboratory;

b) equipment identification;

c) date of calibration;

d) cross reference to the calibration certificate issued in respect of the calibration.

A.7 Subcontracted tests and calibrations

A.7.1 When the term and/or symbol are used on test or calibration reports that also include work done 

by subcontracted laboratories, such use shall be limited to reports in which some or all of the data are 

from tests or calibrations performed by the contracted laboratory under its scope of accreditation. 

A.7.2 A test or calibration report that contains both data covered by the accreditation of the contracted 

laboratory and data provided by a subcontractor shall clearly identify the data that were provided by the 

subcontracted laboratory. The report must prominently display the following statement at the beginning of 

the report: “This report contains data that were produced under subcontract by Laboratory X.” If the 

subcontracted laboratory is accredited by NVLAP, then its Lab Code should also be stated. If the 

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subcontracted laboratory is accredited by a body other than NVLAP, then the name of the accreditation 

body and the laboratory’s number or other unique identifier shall also be stated. If the subcontracted 

laboratory is not accredited, then this must be stated.

A.8 Opinions and interpretations

A.8.1 When opinions and interpretations are covered by the NVLAP scope of accreditation, they may 

be included on a report endorsed with the NVLAP symbol only when the requirements of 

ISO/IEC 17025:2005, 5.10.5 are met; i.e., opinions and interpretations shall be clearly marked. 

A.8.2 Where such statements of opinion and interpretation are outside the scope of accreditation, the 

report shall display the following disclaimer close to the NVLAP symbol or to the expression of opinion: 

“The opinions/interpretations expressed in this report are outside the scope of this laboratory’s 

accreditation.”

A.9 Advertising and promotional materials 

A.9.1 An accredited laboratory may use the NVLAP symbol in advertising or promotional materials 

concerning the laboratory’s accreditation, provided that the laboratory fully conforms to the requirements 

for claiming accreditation status and ensures there is no misrepresentation of the status and the scope of 

accreditation.

A.9.2 Permitted uses of the NVLAP symbol in advertising and promotional materials include: 

a) letterheads;

b) brochures and publications;

c) business cards (as long as the symbol is not used in a way that could imply personnel certification); 

d) websites;

e) other communication media. 

A.9.3 When a laboratory uses the NVLAP symbol in advertising and promotional materials, such as a 

webpage banner or product catalog, such use shall not imply NVLAP endorsement or approval of the 

advertised products or items. Further, the accredited laboratory shall ensure that these requirements for 

referencing NVLAP accreditation are incorporated into contracts to perform work for distributors or 

resellers of a product that has been tested or calibrated by the accredited laboratory; i.e., a product 

distributor or reseller shall not reference NVLAP accreditation in a manner that implies that the 

distributor or reseller is accredited or can produce accredited test or calibration results. The accredited 

laboratory shall also ensure that each distributor or reseller includes a disclaimer when referencing the 

accredited laboratory’s accreditation stating the distributor or reseller is not accredited by NVLAP.

A.9.4 When using the NVLAP symbol for advertising and promotional materials, an organization with 

multiple laboratory accreditations may list all of its NVLAP Lab Codes beneath the logo to form the 

symbol (see example in Fig. 2) or use another means of conveying the same information that is approved 

by NVLAP. However, this form of the symbol shall not be used on laboratory reports and certificates. 

Organizations that have both accredited and unaccredited sites shall ensure that when the NVLAP symbol 

is used in corporate advertising and promotional materials, such use does not imply that accreditation is 

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held for sites that are not accredited and does not misrepresent the scope of accreditation at accredited 

sites.

NOTE: Other variations for the symbol for use in advertising by laboratories with multiple accreditations may be 

approved on a case-by-case basis by NVLAP.

A.10 Misuse of NVLAP term, logo, or symbol 

A.10.1 NVLAP investigates any evidence of misuse of the NVLAP symbol or claim of accreditation 

status. The actions taken by NVLAP to address violations of its policy and procedures for referencing 

NVLAP accreditation may include requests for corrective action, suspension of accreditation, and/or legal 

action, as necessary.

A.10.2 NVLAP has procedures to ensure that an accredited laboratory discontinues the use of the 

NVLAP symbol or any reference to NVLAP accreditation status for testing or calibration immediately on 

suspension, revocation, or voluntary termination of the accreditation (see 3.10, 3.11, and 3.12). This 

includes any reference to NVLAP accreditation in test and calibration reports, correspondence, 

promotional materials, and advertising, including laboratory websites. 

A.11 Examples of the NVLAP symbol 

Figure 1. NVLAP symbol. 

TESTING (OR CALIBRATION)

NVLAP LAB CODE 123456-0 

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Figure 2. Example of NVLAP symbol for a laboratory with multiple accreditations

(used for advertising and promotional purposes only) 

TESTING (OR CALIBRATION)

NVLAP LAB CODE 000000-0 

NVLAP LAB CODE 000001-0 

NVLAP LAB CODE 000002-0 

NVLAP LAB CODE 000003-0 

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Annex B

(normative) 

Implementation of traceability policy in accredited laboratories

B.1 Policy

It is a fundamental requirement that the results of all accredited calibrations and the results of all 

calibrations required to support accredited tests shall be traceable to the SI (the International System of 

Units) through standards maintained by NIST or other internationally recognized national metrology 

institutes (NMIs). ISO/IEC 17025:2005, 5.6 sets out the specific requirements for traceability to be met 

by testing and calibration laboratories. This annex describes how these requirements shall be met and how 

traceability of measurement is assured by an accredited laboratory. The structure of this annex is 

consistent with ILAC-P10:01/2013, which describes the ILAC policy with regard to the metrological 

traceability requirements from ISO/IEC 17025. 

Internationally recognized NMIs are those that are signatory to the Comité International des Poids et 

Mesures (CIPM) Mutual Recognition Arrangement (MRA) titled “Mutual recognition of national 

measurement standards and of calibration and measurement certificates issued by national metrology 

institutes” and that have the necessary calibration services listed in Appendix C of the MRA, Calibration 

and Measurement Capabilities – CMCs, located in the Key Comparison Database (KCDB). For more 

details on the CIPM MRA and the CMC database, please see http://www.bipm.org/en/cipm-mra/ or visit 

the NVLAP website.

B.2 General procedures

B.2.1 Laboratories shall be able to demonstrate proper use of traceable standards and test and 

measurement equipment by competent laboratory personnel in a suitable environment in performing the 

tests for which accreditation is desired or held.

B.2.2 Calibration certificates received by NVLAP-accredited testing and calibration laboratories with 

new or recalibrated equipment shall meet the requirements of ISO/IEC 17025. The certificates shall

include the uncertainty of measurement and/or a statement of compliance with an identified metrological 

specification or clauses thereof. For additional information, see ILAC-P14, ILAC Policy ILAC Policy for 

Uncertainty in Calibration.

B.2.3 For the purpose of assuring traceability, an accredited laboratory may calibrate its own equipment 

if the appropriate requirements of NIST Handbook 150 have been met. Thus, testing laboratories that 

perform calibrations only for themselves do not need to be accredited as calibration laboratories, and 

calibration laboratories that perform specific calibrations only for themselves to support their accredited 

services do not need to be accredited for those specific calibrations. Results of internal calibrations shall 

meet the requirements of B.2.2. 

B.3 Demonstration of traceability 

B.3.1 General

Traceability to the SI shall be demonstrated by one of the following paths: 

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a) use of an NMI whose service is covered by the CIPM MRA, or

b) use of an accredited calibration laboratory, or 

c) use of an NMI that does not have a CMC in the KCDB, or a calibration laboratory whose service is 

not covered by the ILAC MRA.

The requirements for each of these paths of traceability are described in B.3.2 through B.3.4. 

B.3.2 Use of an NMI whose service is covered by the CIPM MRA

A NVLAP-accredited laboratory may submit appropriate physical standards and test and measurement 

equipment directly to NIST or, when appropriate, to another CIPM MRA signatory-NMI that has a CMC 

in the KCDB for the measurement in question. An accredited laboratory may obtain certified reference 

materials from NIST (called “Standard Reference Materials” under copyright) or from another national 

metrology institute.

B.3.3 Use of an accredited calibration laboratory

A NVLAP-accredited laboratory that does not demonstrate traceability as described in B.3.2 shall use 

accredited calibration laboratory services, when available. Accredited calibration laboratories are those 

accredited by NVLAP or by any accreditation body that is a signatory to the International Laboratory 

Accreditation Cooperation Mutual Recognition Arrangement (ILAC MRA). A listing of NVLAPaccredited calibration laboratories is available through the NVLAP online directory of accredited 

laboratories at < https://www-s.nist.gov/niws/index.cfm?event=directory.search>. A listing of ILAC 

MRA signatories is available at http://www.ilac.org/. 

B.3.4 Use of an NMI whose service is not covered by the CIPM MRA or a calibration laboratory 

whose service is not covered by the ILAC MRA

B.3.4.1 General

If an appropriate accredited calibration service provider is not available, a NVLAP-accredited laboratory 

may submit physical standards or test and measurement equipment to a provider whose services do not 

meet the requirements of B.3.2 or B.3.3. However, the services shall meet the relevant criteria for 

metrological traceability in ISO/IEC 17025 (see B.3.4.2 and B.3.4.3). 

B.3.4.2 NMI that does not meet the requirements in B.3.2.

There are a number of factors that shall be considered in the situation where an NMI’s service is suitable 

for the intended need, but is not covered by the CIPA MRA. Those factors may include, but are not 

limited to:

• membership or recognition status in CIPM; 

• CMCs for same parameter in a different range;

• unpublished results of key comparisons;

• regional or bilateral intercomparisons;

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• results of special tests.

In such cases, the NVLAP-accredited laboratory shall consult with NVLAP to determine the appropriate 

means of demonstrating traceability.

B.3.4.3 Calibration service provider that does not meet the requirements in B.3.3

If a NVLAP-accredited laboratory uses a calibration service provider that is not accredited by an ILAC 

MRA signatory, the laboratory shall: 

a) document the lack of an appropriately accredited calibration service provider; 

b) audit the claim of traceability of the provider of the calibration service and document the following 

areas related to the calibration and claim of traceability of its standards and test and measurement 

equipment: 

 1) information regarding assessment of the quality system used by the calibration service 

provider; 

 2) the calibration procedure(s) used by the calibration service provider; 

 3) the physical standards or other test and measurement equipment used by the calibration 

service provider (including evidence of traceability to standards maintained by NIST or an 

appropriate national metrology institute and copies of relevant calibration certificates);

 4) information regarding the calibration intervals of relevant standards or other test and 

measurement equipment;

 5) the environmental conditions of the laboratory; 

 6) the method(s) by which uncertainties are determined (e.g., Guide to the Expression of 

Uncertainty in Measurement (GUM)); and 

 7) the relative uncertainties achieved at all steps of the process;

c) pursue the traceability chain until traceability to appropriate stated references is completely 

validated, when a calibration service provider submits physical standards and/or test and 

measurement equipment used in the calibration to another laboratory(s) not accredited by NVLAP; 

d) enter the audit documentation, including all findings of nonconformance and resolutions of those 

findings, into the laboratory’s quality management record-keeping system.

NOTE An on-site visit to the provider of the calibration service is encouraged, but is not required as long as the 

information listed above is obtained and otherwise verified. Self-declaration of compliance to ISO/IEC 17025 or 

other relevant standards by a calibration service provider is not acceptable evidence of verification of traceability. 

Citation of a NIST Test Number by the calibration service provider likewise is not acceptable evidence of 

verification of traceability.

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B.3.5 Traceability to the SI not available

If traceability to the SI is not available, a NVLAP-accredited laboratory may demonstrate comparison to a 

widely used standard that is clearly specified and documented as mutually agreeable to all parties 

concerned. 

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Annex C

(normative)

Conditions for accreditation

To become accredited and maintain accreditation, a laboratory shall agree in writing to comply with the 

following NVLAP conditions for accreditation: 

a) comply at all times with the NVLAP requirements for accreditation as set forth in NIST Handbook 

150 and relevant technical documents, including any changes to those requirements; 

b) fulfill the accreditation procedure, especially to receive the assessment team and allow access to 

information, documents, and records;

c) when the laboratory conducts activities at clients’ sites, have arrangements to provide access to the 

assessment team;

d) pay the fees charged to the applicant laboratory as determined by NVLAP, and maintain relevant 

financial agreements;

e) participate in proficiency testing as required;

f) follow NVLAP conditions for referencing accreditation status (see Annex A and Annex E);

g) resolve all nonconformities;

h) report to NVLAP within 30 days any significant changes relevant to its accreditation, in any aspect 

of its status or operation relating to:

— legal, commercial, organizational, or ownership status,

— organization, top management, or key personnel, including Authorized Representative and 

Approved Signatories, 

— main policies,

— resources and location, including equipment, facilities, and working environment, where 

significant,

— scope of accreditation, or 

— other matters that may affect the laboratory’s ability to comply with the requirements of NIST 

Handbook 150 and/or relevant technical documents; 

i) return to NVLAP the Certificate of Accreditation and the Scope of Accreditation should it be 

requested to do so by NVLAP. 

In addition to the confidentiality provisions of NIST Handbook 150 paragraph 1.7, NVLAP (administered 

by NIST) and the laboratory seeking accreditation acknowledge and agree that the accreditation 

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assessments and proficiency testing work done by NIST/NVLAP is done in accordance with the authority 

granted to NIST by Title 15 United States Code Section 3710a. The Parties further agree that to the extent 

permitted by law, NIST will protect information obtained during application, on-site assessment, 

proficiency testing, evaluation, and accreditation from disclosure pursuant to Title 15 USC 

3710a(c)(7)(A) and (7)(B) for a period of five (5) years after it is obtained.

For the first five years that laboratory information is held by NVLAP, both confidentiality provisions will 

be in force — NIST Handbook 150 and 15USC3710a. Information in NVLAP's possession for more than 

five years will continue to be held in confidence under the provision of NIST Handbook 150. 

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Annex D

(normative)

Accreditation of laboratories located outside of the United States

D.1 Additional requirements for laboratories located outside of the United States

D.1.1 Laboratories shall provide all documents to NVLAP in English including, but not limited to, 

applications, quality manuals, internal audit and management review records, nonconformity responses, 

and records serving as objective evidence of compliance with NVLAP requirements. During an on-site 

assessment, if the laboratory personnel do not speak English, the laboratory shall provide an 

interpreter(s), subject to NVLAP approval. The interpreter(s) will assist the assessor(s) with conversing 

directly with laboratory management and technical staff and with reviewing laboratory documentation. 

D.1.2 If the fees listed on the NVLAP fee schedule do not cover the cost of an on-site assessment, the 

laboratory will be responsible for all additional costs; e.g., travel by NVLAP assessors, shipment of 

proficiency testing materials to the laboratory, and additional administrative expenses. To ensure that the 

initial or renewal application is processed without delay, payment (in U.S. currency) of the appropriate 

fees should accompany the application. When all the additional costs associated with the application have 

been identified, an invoice for any additional fee amount owed will be sent to the laboratory. 

D.1.3 Pursuant to U.S. Department of Commerce export regulations and/or U.S. Department of State 

International Traffic in Arms Regulations, certain technologies, equipment, data and software may not be 

exported from the United States to certain foreign destinations or may not be shared with certain foreign 

nationals within the United States without first obtaining an export license or official approval. If a 

laboratory uses or possesses regulated technologies, NVLAP requires that the laboratory possess, and 

show upon request, the appropriate license or official U.S. Government approval. For export and license 

information for the Department of Commerce regulations, see the Bureau of Industry and Security 

website, http://www.bis.doc.gov/PoliciesAndRegulations/index.htm. For export and license information 

regarding the State Department International Traffic in Arms Regulations, see the Directorate of Defense 

Trade Controls website, http://www.pmddtc.state.gov/regulations_laws/itar.html. 

D.2 Cross-frontier policy

D.2.1 To meet its obligations as a signatory to the International Laboratory Accreditation Cooperation 

(ILAC) Mutual Recognition Arrangement (Arrangement), NVLAP has a cross-frontier accreditation 

policy in harmony with ILAC-G21, Cross Frontier Accreditation—Principles for Avoiding Duplication. 

When a laboratory located outside of the United States applies for NVLAP accreditation, it is NVLAP 

policy to communicate with and cooperate with, whenever possible, ILAC Arrangement signatory 

laboratory accreditation bodies in the economy of the applicant laboratory.

The purpose of the cross-frontier policy is to ensure that test reports and calibration certificates issued by 

accredited laboratories will be accepted worldwide and to increase confidence among laboratory 

accreditation bodies worldwide while reducing the burden on laboratories caused by duplicate 

accreditations.

D.2.2 NVLAP will discuss this policy with applicant laboratories before NVLAP contacts any 

laboratory accreditation bodies in the laboratory’s own economy.

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Annex E

(normative)

Use of the Accredited Laboratory Combined ILAC MRA Mark

E.1 General

This annex sets forth the policy and procedure for the use of the Accredited Laboratory Combined ILAC 

MRA Mark by NVLAP-accredited laboratories. The Accredited Laboratory Combined ILAC MRA Mark 

is the ILAC MRA Mark in combination with the NVLAP symbol. NVLAP may grant permission to its 

accredited laboratories to use the Accredited Laboratory Combined ILAC MRA Mark for accreditation 

activities covered by the scope of its ILAC MRA signatory status. NVLAP conforms to the rules for the 

use of the ILAC MRA Mark as set forth in ILAC-R7:05/2015, Rules for the Use of the ILAC MRA Mark. 

E.2 Policy for use of the Accredited Laboratory Combined ILAC MRA Mark

The use of the Accredited Laboratory Combined MRA Mark (hereinafter called the “Mark”) is governed 

by the requirements for use of the NVLAP term and symbol as set out in Annex A. Permissible uses 

include reports and certificates, letterheads, contracts, business cards, brochures, advertising, and 

websites.

E.3 Request from an accredited laboratory to use the Mark

E.3.1 A laboratory wishing to use the Mark shall hold an accreditation within a field of accreditation 

covered by NVLAP’s scope of recognition under the ILAC MRA. The laboratory shall send a request to 

NVLAP that includes:

• the policy and procedure for controlling the Mark as described in E.4 a); 

• an example of the Mark in a format that complies with the rules for reproduction in E.5.

E.3.2 The laboratory shall not use the Mark before written approval is received from NVLAP. 

E.3.3 Permission to use the Mark extends only to accredited laboratories established in economies 

where the Mark is registered; however the laboratory may be able to use the Mark for activities 

undertaken outside the economy. 

E.4 Conditions for use of the Mark

By signing the NVLAP conditions for accreditation (see Annex C), the laboratory agrees to fulfilling the 

following conditions for using the Mark. 

a) The laboratory shall have a policy and procedure for controlling the use of the Mark. This 

procedure may be combined with the policy and procedure for controlling the use of the term 

NVLAP and the NVLAP symbol [see Annex A, A.2 a)]. 

b) The laboratory shall meet the same requirements for referencing the Mark as those published for 

referencing NVLAP accreditation in Annex A, with the exception of the rules for reproduction. 

The rules for reproduction of the Mark are set out in E.5 below and supersede those in Annex A, 

A.3.1, b), c) and e). 

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E.5 Reproduction of the Mark

E.5.1 A laboratory shall use the Mark in the proportions shown in Figure 1 below. It shall not be 

distorted, compressed, or stretched in any way.

E.5.2 The text within the Mark (ILAC MRA, NVLAP, NVLAP Lab Code, and type of accreditation 

activity) shall be readable.

E.5.3 The laboratory shall use the Mark on a background that will not impede readability. 

E.5.4 The laboratory may reproduce the Mark in black and white or in one of the following approved 

colors: 

• Process (CMYK) Color Breakdown (C100 M56 Y0 K0) 

• Pantone (PMS) Color Breakdown (Pantone 293c, blue) 

• Website (RBG) Color Breakdown (R0 G0 B229). 

NOTE An electronic copy of the Mark is available from NVLAP upon request.

E.6 Misuse of the Mark

E.6.1 NVLAP will monitor the use of the Mark by accredited laboratories in conjunction with 

monitoring the use of the NVLAP symbol. 

E.6.2 NVLAP will take action on inappropriate uses of the Mark. Such action may include a request for 

corrective action, suspension or revocation of accreditation, or legal action. 

E.7 Examples of the Accredited Laboratory Combined ILAC MRA Mark

The template and proportions for the Mark are shown in Figure 1. 

Figure 1. Accredited Laboratory Combined ILAC MRA Mark 

TESTING (OR CALIBRATION)

NVLAP LAB CODE 123456-0 

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This publication is available free of charge from: http://dx.doi.org/10.6028/NIST.HB.150-2016