MEPC 58/23 

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ANNEX 4 

RESOLUTION MEPC.174(58) 

Adopted on 10 October 2008 

GUIDELINES FOR APPROVAL OF 

BALLAST WATER MANAGEMENT SYSTEMS (G8) 

THE MARINE ENVIRONMENT PROTECTION COMMITTEE, 

RECALLING Article 38(a) of the Convention on the International Maritime Organization 

concerning the functions of the Marine Environment Protection Committee conferred upon it by 

the international conventions for the prevention and control of marine pollution, 

 RECALLING ALSO that the International Conference on Ballast Water Management for 

Ships held in February 2004 adopted the International Convention for the Control and 

Management of Ships’ Ballast Water and Sediments, 2004 (the Ballast Water Management 

Convention) together with four conference resolutions, 

NOTING that regulation D-3 of the Annex to the Ballast Water Management Convention 

provides that ballast water management systems used to comply with this Convention must be 

approved by the Administration, taking into account Guidelines developed by the Organization, 

NOTING ALSO resolution MEPC.125(53) by which the Committee adopted 

the Guidelines for approval of ballast water management systems (G8), 

NOTING FURTHER that by resolution MEPC.125(53), the Committee resolved to 

keep Guidelines (G8) under review in the light of experience gained, 

 HAVING CONSIDERED, at its fifty-eighth session, the recommendation made by the 

Ballast Water Review Group, 

1. ADOPTS the revised Guidelines for approval of ballast water management systems (G8), 

as set out in the Annex to this resolution; 

2. INVITES Member Governments to give due consideration to the revised Guidelines (G8) 

when type approving ballast water management systems; 

3. AGREES to keep the revised Guidelines (G8) under review in the light of experience 

gained; 

4. URGES Member Governments to bring the aforementioned Guidelines to the attention of 

manufacturers of ballast water management systems and other parties concerned with a view to 

encouraging their use; and 

5. REVOKES the Guidelines adopted by resolution MEPC.125(53). 
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ANNEX 

GUIDELINES FOR APPROVAL OF 

BALLAST WATER MANAGEMENT SYSTEMS (G8) 

Contents 

1 INTRODUCTION 

General 

 Goal and purpose 

 Applicability 

 Summary of requirements 

2 BACKGROUND 

3 DEFINITIONS 

4 TECHNICAL SPECIFICATIONS 

Ballast water management systems 

 Ballast water treatment equipment 

 Control and monitoring equipment 

5 TYPICAL DOCUMENT REQUIREMENTS FOR THE PLAN APPROVAL 

PROCESS 

6 APPROVAL AND CERTIFICATION PROCEDURES 

7 INSTALLATION REQUIREMENTS 

Sampling facilities 

8 INSTALLATION SURVEY AND COMMISSIONING PROCEDURES 

ANNEX 

PART 1 – SPECIFICATIONS FOR PRE-TEST EVALUATION OF SYSTEM 

DOCUMENTATION 

PART 2 – TEST AND PERFORMANCE SPECIFICATIONS FOR APPROVAL OF 

BALLAST WATER MANAGEMENT SYSTEMS 

PART 3 – SPECIFICATION FOR ENVIRONMENTAL TESTING FOR APPROVAL 

OF BALLAST WATER MANAGEMENT SYSTEMS 

PART 4 – SAMPLE ANALYSIS METHODS FOR THE DETERMINATION OF 

BIOLOGICAL CONSTITUENTS IN BALLAST WATER 

Appendix – TYPE APPROVAL CERTIFICATE OF BALLAST WATER MANAGEMENT 

SYSTEM
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GUIDELINES FOR APPROVAL OF 

BALLAST WATER MANAGEMENT SYSTEMS (G8) 

1 INTRODUCTION 

General 

1.1 These Guidelines for approval of ballast water management systems are aimed 

primarily at Administrations, or their designated bodies, in order to assess whether ballast 

water management systems meet the standard as set out in regulation D-2 of the 

“International Convention for the Control and Management of Ships’ Ballast Water 

and Sediments,” hereafter referred to as the “Convention”. In addition, this document can be 

used as guidance for manufacturers and shipowners on the evaluation procedure that 

equipment will undergo and the requirements placed on ballast water management systems. 

These Guidelines should be applied in an objective, consistent and transparent way and their 

application should be evaluated periodically by the Organization. 

1.2 Articles and regulations referred to in these Guidelines are those contained in 

the Convention. 

1.3 The Guidelines include general requirements concerning design and construction, 

technical procedures for evaluation and the procedure for issuance of the Type Approval 

Certificate of the ballast water management system. 

1.4 These Guidelines are intended to fit within an overall framework for evaluating the 

performance of systems that includes the experimental shipboard evaluation of prototype systems 

under the provisions of regulation D-4, approval of ballast water management systems and 

associated systems that comply fully with the requirements of the Convention, and port State 

control sampling for compliance under the provisions of article 9 of the Convention. 

1.5 The requirements of regulation D-3 stipulate that ballast water management systems used 

to comply with the Convention must be approved by the Administration, taking into account 

these Guidelines. In addition to such ballast water management system approval, as set forth in 

regulation A-2 and regulation B-3, the Convention requires that discharges of ballast water from 

ships must meet the regulation D-2 performance standard on an on-going basis. Approval of a 

system is intended to screen-out management systems that would fail to meet the standards 

prescribed in regulation D-2 of the Convention. Approval of a system, however, does not ensure 

that a given system will work on all vessels or in all situations. To satisfy the Convention, a 

discharge must comply with the D-2 standard throughout the life of the vessel. 

1.6 The operation of ballast water management systems should not impair the health and 

safety of the ship or personnel, nor should it present any unacceptable harm to the 

environment or to public health. 

1.7 Ballast water management systems are required to meet the standards of 

regulation D-2 and the conditions established in regulation D-3 of the Convention. 

These Guidelines serve to evaluate the safety, environmental acceptability, practicability and 

biological effectiveness of the systems designed to meet these standards and conditions. 
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The cost effectiveness of type-approved equipment will be used in determining the need for 

revisions of these Guidelines. 

1.8 These Guidelines contain recommendations regarding the design, installation, 

performance, testing environmental acceptability and approval of ballast water 

management systems. 

1.9 To achieve consistency in its application, the approval procedure requires that a uniform 

manner of testing, analysis of samples, and evaluation of results is developed and applied. 

These Guidelines should be applied in an objective, consistent, and transparent way; and their 

suitability should be periodically evaluated and revised as appropriate by the Organization. 

New versions of these Guidelines should be duly circulated by the Organization. Due 

consideration should be given to the practicability of the ballast water management systems. 

Goal and purpose 

1.10 The goal of these Guidelines is to ensure uniform and proper application of the 

standards contained in the Convention. As such the Guidelines are to be updated as the state 

of knowledge and technology may require. 

1.11 The purposes of these Guidelines are to: 

.1 define test and performance requirements for the approval of ballast water 

management systems; 

.2 assist Administrations in determining appropriate design, construction and 

operational parameters necessary for the approval of ballast water management 

systems; 

.3 provide a uniform interpretation and application of the requirements of 

regulation D-3; 

.4 provide guidance to Administrations, equipment manufacturers and shipowners in 

determining the suitability of equipment to meet the requirements of 

the Convention and of the environmental acceptability of treated water; and 

.5 assure that ballast water management systems approved by Administrations are 

capable of achieving the standard of regulation D-2 in land-based and shipboard 

evaluations and do not cause unacceptable harm to the vessel, crew, the 

environment or public health. 

Applicability 

1.12 These Guidelines apply to the approval of ballast water management systems in 

accordance with the Convention. 

1.13 These Guidelines apply to ballast water management systems intended for installation 

on board all ships required to comply with regulation D-2. 
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Summary of requirements 

1.14 The land-based and shipboard approval requirements for ballast water management 

systems specified in these guidelines are summarized below. 

1.15 The manufacturer of the equipment should submit information regarding the design, 

construction, operation and functioning of the ballast water management system in 

accordance with Part 1 of the annex. This information should be the basis for a first 

evaluation of suitability by the Administration. 

1.16 The ballast water management system should be tested for Type Approval in 

accordance with the procedures described in Parts 2 and 3 of the annex. 

1.17 Successful fulfilment of the requirements and procedures for Type Approval as 

outlined in Parts 2 and 3 of the annex should lead to the issuance of a Type Approval 

Certificate by the Administration. 

1.18 When a Type Approved ballast water management system is installed on board, an 

installation survey according to section 8 should be carried out. 

2 BACKGROUND 

2.1 The requirements of the Convention relating to approval of ballast water management 

systems used by ships are set out in regulation D-3. 

2.2 Regulation D-2 stipulates that ships meeting the requirements of the Convention by 

meeting the ballast water performance standard must discharge: 

.1 less than 10 viable organisms per cubic metre greater than or equal 

to 50 micrometres in minimum dimension; 

.2 less than 10 viable organisms per millilitre less than 50 micrometres in minimum 

dimension and greater than or equal to 10 micrometres in minimum dimension; 

and 

.3 less than the following concentrations of indicator microbes, as a human health 

standard: 

.1 Toxicogenic Vibrio cholerae (serotypes O1 and O139) with less 

than 1 Colony Forming Unit (cfu) per 100 millilitres or less than 1 cfu 

per 1 gramme (wet weight) of zooplankton samples; 

.2 Escherichia coli less than 250 cfu per 100 millilitres; and 

.3 Intestinal Enterococci less than 100 cfu per 100 millilitres. 
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3 DEFINITIONS 

For the purpose of these Guidelines: 

3.1 Active Substance means a substance or organism, including a virus or a fungus that 

has a general or specific action on or against harmful aquatic organisms and pathogens. 

3.2 Ballast Water Management System (BWMS) means any system which processes 

ballast water such that it meets or exceeds the ballast water performance standard in 

regulation D-2. The BWMS includes ballast water treatment equipment, all associated 

control equipment, monitoring equipment and sampling facilities. 

3.3 The Ballast Water Management Plan is the document referred to in regulation B-1 of 

the Convention describing the ballast water management process and procedures 

implemented on board individual ships. 

3.4 Ballast Water Treatment Equipment means equipment which mechanically, 

physically, chemically, or biologically processes, either singularly or in combination, 

to remove, render harmless, or avoid the uptake or discharge of harmful aquatic organisms 

and pathogens within ballast water and sediments. Ballast water treatment equipment may 

operate at the uptake or discharge of ballast water, during the voyage, or at a combination of 

these events. 

3.5 Control Equipment refers to the installed equipment required to operate and control 

the ballast water treatment equipment. 

3.6 The Convention means the International Convention for the Control and Management 

of Ships’ Ballast Water and Sediments. 

3.7 Monitoring Equipment refers to the equipment installed for the assessment of the 

effective operation of the ballast water treatment equipment. 

3.8 Sampling Facilities refers to the means provided for sampling treated or untreated 

ballast water as needed in these Guidelines and in the “Guidelines for ballast water 

sampling (G2)” developed by the Organization. 

3.9 Shipboard Testing is a full-scale test of a complete BWMS carried out on board a ship 

according to Part 2 of the annex to these Guidelines, to confirm that the system meets the 

standards set by regulation D-2 of the Convention. 

3.10 Treatment Rated Capacity (TRC) is the maximum continuous capacity expressed in 

cubic metres per hour for which the BWMS is type approved. It states the amount of ballast 

water that can be treated per unit time by the BWMS to meet the standard in regulation D-2 

of the Convention. 

3.11 Land-based Testing is a test of the BWMS carried out in a laboratory, equipment 

factory or pilot plant including a moored test barge or test ship, according to Parts 2 and 3 of 

the annex to these Guidelines, to confirm that the BWMS meets the standards set by 

regulation D-2 of the Convention. 
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3.12 Viable Organisms are organisms and any life stages thereof that are living. 

4 TECHNICAL SPECIFICATIONS 

4.1 This section details the general technical requirements which a BWMS should meet in 

order to obtain Type Approval. 

Ballast water management systems 

4.2 The BWMS should not contain or use any substance of a dangerous nature, unless 

adequate arrangements for storage, application, mitigation, and safe handling, acceptable to 

the Administration, are provided to mitigate any hazards introduced thereby. 

4.3 In case of any failure compromising the proper operation of the BWMS, audible and 

visual alarm signals should be given in all stations from which ballast water operations 

are controlled. 

4.4 All working parts of the BWMS that are liable to wear or to be damaged should be 

easily accessible for maintenance. The routine maintenance of the BWMS and 

troubleshooting procedures should be clearly defined by the manufacturer in the operating 

and maintenance manual. All maintenance and repairs should be recorded. 

4.5 To avoid interference with the BWMS, the following items should be included: 

.1 every access of the BWMS beyond the essential requirements of paragraph 4.4, 

should require the breaking of a seal; 

.2 if applicable, the BWMS should be so constructed that a visual alarm is always 

activated whenever the BWMS is in operation for purposes of cleaning, 

calibration, or repair, and these events should be recorded by the control 

equipment; 

.3 in the event of an emergency, suitable by-passes or overrides to protect the 

safety of the ship and personnel should be installed; and 

.4 any bypass of the BWMS should activate an alarm, and the bypass event 

should be recorded by the Control Equipment. 

4.6 Facilities should be provided for checking, at the renewal surveys and according to the 

manufacturer’s instructions, the performance of the BWMS components that take 

measurements. A calibration certificate certifying the date of the last calibration check, 

should be retained on board for inspection purposes. Only the manufacturer or persons 

authorized by the manufacturer should perform the accuracy checks. 

Ballast water treatment equipment 

4.7 The ballast water treatment equipment should be robust and suitable for working in 

the shipboard environment, should be of a design and construction adequate for the service 

for which it is intended and should be so installed and protected as to reduce to a minimum 
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any danger to persons on board, due regard being paid to hot surfaces and other hazards. 

The design should have regard to materials used in construction, the purpose for which the 

equipment is intended, the working conditions to which it will be subjected and the 

environmental conditions on board. 

4.8 The ballast water treatment equipment should be provided with simple and effective 

means for its operation and control. It should be provided with a control system that should 

be such that the services needed for the proper operation of the ballast water treatment 

equipment are ensured through the necessary automatic arrangements. 

4.9 The ballast water treatment equipment should, if intended to be fitted in locations 

where flammable atmospheres may be present, comply with the relevant safety regulations 

for such spaces. Any electrical equipment that is part of the BWMS should be based in a 

non-hazardous area, or should be certified by the Administration as safe for use in a 

hazardous area. Any moving parts, which are fitted in hazardous areas, should be arranged 

so as to avoid the formation of static electricity. 

Control and monitoring equipment 

4.10 The BWMS should incorporate control equipment that automatically monitors and 

adjusts necessary treatment dosages or intensities or other aspects of the BWMS of the 

vessel, which while not directly effecting treatment, are nonetheless required for proper 

administration of the necessary treatment. 

4.11 The control equipment should incorporate a continuous self-monitoring function 

during the period in which the BWMS is in operation. 

4.12 The monitoring equipment should record the proper functioning or failure of 

the BWMS. 

4.13 To facilitate compliance with regulation B-2, the control equipment should also be 

able to store data for at least 24 months, and should be able to display or print a record for 

official inspections as required. In the event the control equipment is replaced, means should 

be provided to ensure the data recorded prior to replacement remains available on board 

for 24 months. 

4.14 It is recommended that simple means be provided aboard ship to check on drift by 

measuring devices that are part of the control equipment, repeatability of the control 

equipment devices, and the ability to re-zero the control equipment meters. 

5 TYPICAL DOCUMENT REQUIREMENTS FOR THE PLAN APPROVAL PROCESS 

5.1 The documentation submitted for approval should include at least the following: 

.1 a description of the BWMS. The description should include a diagrammatic 

drawing of the typical or required pumping and piping arrangements, and 

sampling facilities, identifying the operational outlets for treated ballast water 

and any waste streams as appropriate and necessary. Special considerations 
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may have to be given to installations intended for ships that have unusual 

pumping and piping arrangements; 

.2 equipment manuals, supplied by manufacturers, containing details of the major 

components of the BWMS and their operation and maintenance; 

.3 a generic operations and technical manual for the complete BWMS. This 

manual should cover the arrangements, the operation and maintenance of the 

BWMS as a whole and should specifically describe parts of the BWMS which 

are not covered by the manufacturer’s equipment manuals; 

.4 the operations section of the manual including normal operational procedures 

and procedures for the discharge of untreated water in the event of malfunction 

of the ballast water treatment equipment, maintenance procedures, and 

emergency action necessary for securing the ship; 

.5 methods for the conditioning of treated water prior to discharge should be 

provided, and assessment of discharged water should include a description of 

the effect of treatment on the ship’s ballast water, in particular the nature of 

any treatment residuals and by-products and the water’s suitability for 

discharge into coastal waters. A description should also be provided of any 

actions necessary to monitor, and if necessary “condition”, treated water prior 

to discharge in order that it meets applicable water quality regulations; if it can 

reasonably be concluded that the treatment process could result in changes to 

the chemical composition of the treated water such that adverse impacts to 

receiving waters might occur upon discharge, the documentation should 

include results of toxicity tests of treated water. The toxicity tests should 

include assessments of the effects of hold time following treatment, and 

dilution, on the toxicity. Toxicity tests of the treated water should be 

conducted in accordance with paragraphs 5.2.3 to 5.2.7 of the Procedure 

for approval of ballast water management systems that make use 

of Active Substances (G9), as revised, (resolution MEPC.169(57)); 

.6 a description of BWMS side streams (e.g., filtered material, centrifugal 

concentrate, waste or residual chemicals) including a description of the actions 

planned to properly manage and dispose of such wastes; 

.7 a technical section of the manual including adequate information (description 

and diagrammatic drawings of the monitoring system and electrical/electronic 

wiring diagrams) to enable faultfinding. This section should include 

instructions for keeping a maintenance record; 

.8 a technical installation specification defining, inter alia, requirements for the 

location and mounting of components, arrangements for maintaining the 

integrity of the boundary between safe and hazardous spaces and the 

arrangement of the sample piping; and 
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.9 a recommended test and checkout procedure specific to the BWMS. 

This procedure should specify all the checks to be carried out in a functional 

test by the installation contractor and should provide guidance for the surveyor 

when carrying out the on board survey of the BWMS and confirming the 

installation reflects the manufacturer’s specific installation criteria. 

6 APPROVAL AND CERTIFICATION PROCEDURES 

6.1 A BWMS which in every respect fulfils the requirements of these Guidelines may be 

approved by the Administration for fitting on board ships. The approval should take the form of 

a Type Approval Certificate of BWMS, specifying the main particulars of the apparatus and any 

limiting conditions on its usage necessary to ensure its proper performance. Such certificate 

should be issued in the format shown in appendix 1. A copy of the Type Approval Certificate 

of BWMS should be carried on board ships fitted with such a system at all times. 

6.2 A Type Approval Certificate of BWMS should be issued for the specific application for 

which the BWMS is approved, e.g., for specific ballast water capacities, flow rates, salinity or 

temperature regimes, or other limiting conditions or circumstances as appropriate. 

6.3 A Type Approval Certificate of BWMS should be issued by the Administration based on 

satisfactory compliance with all the test requirements described in Parts 2, 3 and 4 of the annex. 

6.4 An Administration may issue a Type Approval Certificate of BWMS based on separate 

testing or on testing already carried out under supervision by another Administration. 

6.5 The Type Approval Certificate of BWMS should: 

.1 identify the type and model of the BWMS to which it applies and identify 

equipment assembly drawings, duly dated; 

.2 identify pertinent drawings bearing model specification numbers or equivalent 

identification details; 

.3 include a reference to the full performance test protocol on which it is based, and 

be accompanied by a copy of the original test results; and 

.4 identify if it was issued by an Administration based on a Type Approval 

Certificate previously issued by another Administration. Such a certificate should 

identify the Administration that conducted the tests on the BWMS and a copy of 

the original test results should be attached to the Type Approval Certificate 

of BWMS. 

6.6 An approved BWMS may be Type Approved by other Administrations for use on their 

vessels. Should a system approved by one country fail Type Approval in another country, then 

the two countries concerned should consult one another with a view to reaching a mutually 

acceptable agreement. 
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7 INSTALLATION REQUIREMENTS 

Sampling facilities 

7.1 The BWMS should be provided with sampling facilities so arranged in order to collect 

representative samples of the ship’s ballast water. 

7.2 Sampling facilities should in any case be located on the BWMS intake, before the 

discharging points, and any other points necessary for sampling to ascertain the proper 

functioning of the equipment as may be determined by the Administration. 

8 INSTALLATION SURVEY AND COMMISSIONING PROCEDURES 

8.1 Verify that the following documentation is on board in a suitable format: 

.1 a copy of the Type Approval Certificate of BWMS; 

.2 a statement from the Administration, or from a laboratory authorized by the 

Administration, to confirm that the electrical and electronic components of 

the BWMS have been type-tested in accordance with the specifications for 

environmental testing contained in Part 3 of the annex; 

.3 equipment manuals for major components of the BWMS; 

.4 an operations and technical manual for the BWMS specific to the ship and 

approved by the Administration, containing a technical description of the BWMS, 

operational and maintenance procedures, and backup procedures in case of 

equipment malfunction; 

.5 installation specifications; 

.6 installation commissioning procedures; and 

.7 initial calibration procedures. 

8.2 Verify that: 

.1 the BWMS installation has been carried out in accordance with the technical 

installation specification referred to in paragraph 8.1.5; 

.2 the BWMS is in conformity with the Type Approval Certificate of BWMS issued 

by the Administration or its representative; 

.3 the installation of the complete BWMS has been carried out in accordance with 

the manufacturer’s equipment specification; 

.4 any operational inlets and outlets are located in the positions indicated on the 

drawing of the pumping and piping arrangements; 
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.5 the workmanship of the installation is satisfactory and, in particular, that any 

bulkhead penetrations or penetrations of the ballast system piping are to the 

relevant approved standards; and 

.6 the control and monitoring equipment operates correctly. 
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ANNEX 

This annex provides detailed test and performance specifications for a BWMS and 

contains: 

PART 1 – Specifications for Pre-test Evaluation of System Documentation 

PART 2 – Test and Performance Specifications for Approval of Ballast Water 

Management Systems 

PART 3 – Specification for Environmental Testing for Approval of Ballast 

Water Management Systems 

PART 4 – Sample Analysis Methods for the Determination of Biological 

Constituents in Ballast Water 

PART 1 – SPECIFICATIONS FOR PRE-TEST EVALUATION OF SYSTEM 

DOCUMENTATION 

1.1 Adequate documentation should be prepared and submitted to the Administration as part 

of the approval process well in advance of the intended approval testing of a BWMS. Approval 

of the submitted documentation should be a pre-requisite for carrying out independent 

approval tests. 

General 

1.2 Documentation should be provided by the manufacturer/developer for two primary 

purposes: evaluating the readiness of the BWMS for undergoing approval testing, and evaluating 

the manufacturer’s proposed test requirements and procedures for the test. 

Readiness evaluation 

1.3 The readiness evaluation should examine the design and construction of the BWMS to 

determine whether there are any fundamental problems that might constrain the ability of 

the BWMS to manage ballast water as proposed by the manufacturer, or to operate safely, 

on board ships. The latter concern should, in addition to basic issues related to the health and 

safety of the crew, interactions with the ship’s systems and cargo, and potential adverse 

environmental effects, also consider the potential for longer-term impacts to the safety of the 

crew and vessel through effects of the BWMS on corrosion in the ballast system and 

other spaces. 

1.4 The evaluation should also address the degree, if any, to which the 

manufacturer’s/developer’s efforts during the research and development phase tested the 

performance and reliability of the system under operational shipboard conditions and should 

include a report of the results of those tests. 
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Test proposal evaluation 

1.5 Evaluation of the test proposal should examine all of the manufacturer’s stated 

requirements and procedures for installing, calibrating, and operating (including maintenance 

requirements) the BWMS during a test. This evaluation should help the test organization to 

identify any potential health or environmental safety problems, unusual operating requirements 

(labour or materials), and any issues related to the disposal of treatment by-products or 

waste streams. 

Documentation 

1.6 The documentation to be submitted should include at least the following: 

.l Technical Manual – The technical description should include: 

– product specification; 

– process description; 

– operational instructions; 

– details (including Certificates where appropriate) of the major 

components and materials used; 

– technical installation specifications in accordance with manufacturers’ 

specific installation criteria; 

– system limitations; and 

– routine maintenance and trouble-shooting procedures. 

.2 BWMS Drawings – Diagrammatic drawings of the pumping and piping 

arrangements, electrical/electronic wiring diagrams, which should include 

reference to any waste streams and sampling points; 

.3 Link to the Ballast Water Management Plan – Information regarding the 

characteristics and arrangements in which the system is to be installed as well 

as the scope of the ships (sizes, types and operation) for which the system is 

intended. This information can later form the link between the system and the 

ship’s ballast water management plan; and 

.4 Environmental and Public Health Impacts – Potential hazards for the 

environment should be identified and documented based on environmental 

studies performed to the extent necessary to assure that no harmful effects are 

to be expected. In the case of ballast water management systems that make use 

of Active Substances or Preparations containing one or more Active 

Substances the “Procedure for the approval of ballast water management 

systems that make use of Active Substances (G9)”, as revised, should be 
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followed. The system should then ensure that dosage of the Active Substance 

and the maximum allowable discharge concentration is kept under the 

approved criteria at all times. In the case of ballast water management systems 

that do not make use of Active Substances or Preparations, but which could 

reasonably be expected to result in changes to the chemical composition of the 

treated water such that adverse impacts to receiving waters might occur upon 

discharge, the documentation should include results of toxicity tests of treated 

water as described in paragraph 5.1.5 of these Guidelines. 

1.7 The documentation may include specific information relevant to the test set-up to be 

used for land-based testing according to these Guidelines. Such information should include 

the sampling needed to ensure proper functioning and any other relevant information needed 

to ensure proper evaluation of the efficacy and effects of the equipment. The information 

provided should also address general compliance with applicable environment, health and 

safety standards during the Type Approval procedure. 

PART 2 – TEST AND PERFORMANCE SPECIFICATIONS FOR APPROVAL OF 

BALLAST WATER MANAGEMENT SYSTEMS 

The Administration decides the sequence of land-based and shipboard testing. 

2.1 Quality Assurance and Quality Control Procedures

2.1.1 The testing body performing the tests should have implemented appropriate quality 

control measures in accordance with recognized international standards acceptable to the 

Administration. 

2.1.2 The approval testing process should contain a rigorous quality control/quality 

assurance program, consisting of: 

.1 Both a Quality Management Plan (QMP) and a Quality Assurance Project Plan 

(QAPP). Guidance on preparation of these plans, along with other guidance 

documents and other general quality control information are available from 

appropriate international organizations4

. 

.2 The QMP addresses the quality control management structure and policies of 

the testing body (including subcontractors and outside laboratories). 

.3 The QAPP is a project specific technical document reflecting the specifics of 

the BWMS to be tested, the test facility, and other conditions affecting the 

actual design and implementation of the required experiments. 

2.2 Shipboard tests 

2.2.1 A shipboard test cycle includes: 

 

4

 Such as ISO/IEC 17025. 
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.1 the uptake of ballast water of the ship; 

.2 the storage of ballast water on the ship; 

.3 treatment of the ballast water in accordance with paragraph 2.2.2.3 by 

the BWMS, except in control tanks; and 

.4 the discharge of ballast water from the ship. 

Success criteria for shipboard testing 

2.2.2 In evaluating the performance of BWMS installation(s) on a ship or ships, the following 

information and results should be supplied to the satisfaction of the Administration: 

.1 Test plan to be provided prior to testing. 

.2 Documentation that the BWMS is of a capacity within the range of the treatment 

rated capacity for which it is intended. 

.3 The amount of ballast water tested in the test cycle on board should be consistent 

with the normal ballast operations of the ship and the BWMS should be operated 

at the treatment rated capacity for which it is intended to be approved. 

.4 Documentation of the results of three consecutive, valid test cycles showing 

discharge of treated ballast water in compliance with regulation D-2. 

.5 Valid tests are indicated by uptake water, for both the control tank and ballast 

water to be treated, with viable organism concentration exceeding 10 times the 

maximum permitted values in regulation D-2.1 and control tank viable organism 

concentration exceeding the values of regulation D-2.1 on discharge. 

.6 Sampling regime: 

.1 For the control tank: 

.1 three replicate samples of influent water, collected over the period 

of uptake (e.g., beginning, middle, end); and 

.2 three replicate samples of discharge control water, collected over 

the period of discharge (e.g., beginning, middle, end). 

.2 For treated ballast water: 

.1 Three replicate samples of discharge treated water collected at 

each of three times during the period of discharge 

(e.g., 3 x beginning, 3 x middle, 3 x end). 

.3 Sample sizes are: 
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.1 For the enumeration of organisms greater than or equal 

to 50 micrometres or more in minimum dimension, samples of at 

least one cubic metre should be collected. If samples are 

concentrated for enumeration the samples should be concentrated 

using a sieve no greater than 50 micrometres mesh in diagonal 

dimension. 

.2 For the enumeration of organisms greater than or equal 

to 10 micrometres and less than 50 micrometres in minimum 

dimension, samples of at least one litre should be collected. 

If samples are concentrated for enumeration the samples should be 

concentrated using a sieve no greater than 10 micrometres mesh in 

diagonal dimension. 

.3 For the evaluation of bacteria a sample of at least 500 millilitres 

should be taken from the influent and treated water. In the absence 

of laboratory facilities on board the toxicogenic test requirements 

should be conducted in an appropriately approved laboratory. 

However, this may limit the applicability of this test. 

.7 The test cycles including invalid and unsuccessful test cycles are to span a trial 

period of not less than six months. 

.8 The applicant is requested to perform three consecutive test cycles that comply 

with regulation D-2 and which are valid in accordance with paragraph 2.2.2.5. 

Any invalid test cycle does not affect the consecutive sequence. 

.9 The source water for test cycles shall be characterized by measurement of salinity, 

temperature, particulate organic carbon and total suspended solids. 

.10 For system operation throughout the trial period, the following information should 

also be provided: 

.1 documentation of all ballast water operations including volumes and 

locations of uptake and discharge, and if heavy weather was encountered 

and where; 

.2 the possible reasons for the occurrence of an unsuccessful test cycle, or a 

test cycle discharge failing the D-2 standard should be investigated and 

reported to the Administration; 

.3 documentation of scheduled maintenance performed on the system; 

.4 documentation of unscheduled maintenance and repair performed on the 

system; 

.5 documentation of engineering parameters monitored as appropriate to the 

specific system; and 

.6 documentation of functioning of the control and monitoring equipment. 
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2.3 Land-based testing 

2.3.1 The test set-up including the ballast water treatment equipment should operate as 

described in the provided documentation during at least 5 valid replicate test cycles. Each test 

cycle should take place over a period of at least 5 days. 

2.3.2 A land-based test cycle should include: 

.1 the uptake of ballast water by pumping; 

.2 the storage of ballast water for at least 5 days; 

.3 treatment of ballast water within the BWMS, except in control tanks; and 

.4 the discharge of ballast water by pumping. 

2.3.3 Testing should occur using different water conditions sequentially as provided for in 

paragraphs 2.3.17 and 2.3.18. 

2.3.4 The BWMS should be tested at its rated capacity or as given in paragraphs 2.3.13 

to 2.3.15 for each test cycle. The equipment should function to specifications during this 

test. 

2.3.5 The analysis of treated water discharge from each test cycle should be used to 

determine that the average of discharge samples does not exceed the concentrations of 

regulation D-2 of the Convention. 

2.3.6 The analysis of treated water discharge from the relevant test cycle(s) should also be used 

to evaluate the toxicity of the discharged water for BWMS that make use of Active Substances 

and also for those BWMS that do not make use of Active Substances or Preparations but which 

could reasonably be expected to result in changes to the chemical composition of the treated 

water such that adverse impacts to receiving waters might occur upon discharge. Toxicity tests 

of the treated water discharge should be conducted in accordance with paragraphs 5.2.3 to 5.2.7 

of the Procedure for approval of ballast water management systems that make use 

of Active Substances, as revised (resolution MEPC.169(57)). 

Land-based testing objectives, limitations and criteria for evaluation 

2.3.7 The land-based testing serves to determine the biological efficacy and environmental 

acceptability of the BWMS under consideration for Type Approval. The approval testing aims to 

ensure replicability and comparability to other treatment equipment. 

2.3.8 Any limitations imposed by the ballast water management system on the testing 

procedure described here should be duly noted and evaluated by the Administration. 

Land-based set-up 

2.3.9 The test set-up for approval tests should be representative of the characteristics and 

arrangements of the types of ships in which the equipment is intended to be installed. 

The test set-up should therefore include at least the following: 
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.1 the complete BWMS to be tested; 

.2 piping and pumping arrangements; and 

.3 the storage tank that simulates a ballast tank, constructed such that the water in 

the tank should be completely shielded from light. 

2.3.10 The control and treated simulated ballast tanks should each include: 

.1 a minimum capacity of 200 m3; 

.2 normal internal structures, including lightening and drainage holes; 

.3 standard industry practices for design, construction and surface coatings for 

ships; and 

.4 the minimum modifications required for structural integrity on land. 

2.3.11 The test set-up should be pressure-washed with tap water, dried and swept to remove 

loose debris, organisms and other matter before starting testing procedures, and between 

test cycles. 

2.3.12 The test set-up will include facilities to allow sampling as described in paragraphs 2.3.26 

and 2.3.27 and provisions to supply influents to the system, as specified in paragraph 2.3.19 

and/or 2.3.20. The installation arrangements should conform in each case with those specified 

and approved under the procedure outlined in section 7 of the main body to these Guidelines. 

Ballast water treatment equipment scaling 

2.3.13 In-line treatment equipment may be downsized for land-based testing, but only when 

the following criteria are taken into account: 

.1 equipment with a TRC equal to or smaller than 200 m3/h should not be 

downscaled; 

.2 equipment with a TRC larger than 200 m3/h but smaller than 1,000 m3/h may 

be downscaled to a maximum of 1:5 scale, but may not be smaller 

than 200 m3/h; and 

.3 equipment with a TRC equal to, or larger than, 1,000 m3/h may be downscaled 

to a maximum of 1:100 scale, but may not be smaller than 200 m3/h. 

2.3.14 The manufacturer of the equipment should demonstrate by using mathematical 

modelling and/or calculations, that any downscaling will not affect the ultimate functioning 

and effectiveness on board a ship of the type and size for which the equipment 

will be certified. 

2.3.15 In-tank treatment equipment should be tested on a scale that allows verification of 

full-scale effectiveness. The suitability of the test set-up should be evaluated by the 

manufacturer and approved by the Administration. 
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2.3.16 Larger scaling may be applied and lower flow rates used than provided for in 2.3.13, 

if the manufacturer can provide evidence from full-scale shipboard testing and in accordance 

with 2.3.14 that scaling and flow rates will not adversely affect the ability of the results to 

predict full-scale compliance with the standard. 

Land-based test design – inlet and outlet criteria 

2.3.17 For any given set of test cycles (5 replicates is considered a set) a salinity range 

should be chosen. Given the salinity, the test water used in the test set up described above 

should have dissolved and particulate content in one of the following combinations: 

Salinity 

> 32 PSU 3 – 32 PSU < 3 PSU 

Dissolved Organic 

Carbon (DOC) > 1 mg/l > 5 mg/l > 5 mg/l 

Particulate 

Organic Carbon 

(POC) 

> 1 mg/l > 5 mg/l > 5 mg/l 

Total Suspended 

Solids (TSS) > 1 mg/l > 50 mg/l > 50 mg/l 

2.3.18 At least two sets of tests cycles should be conducted, each with a different salinity range 

and associated dissolved and particulate content as prescribed in paragraph 2.3.17. Tests under 

adjacent salinity ranges in the above table should be separated by at least 10 PSU5

. 

2.3.19 Test organisms may be either naturally occurring in the test water, or cultured 

species that may be added to the test water. The organism concentration should comply with 

paragraph 2.3.20 below. 

2.3.20 The influent water should include: 

.1 test organisms of greater than or equal to 50 micrometres or more in minimum 

dimension should be present in a total density of preferably 106

 but not less 

than 105

 individuals per cubic metre, and should consist of at least 5 species 

from at least 3 different phyla/divisions; 

.2 test organisms greater than or equal to 10 micrometres and less 

than 50 micrometres in minimum dimension should be present in a total 

density of preferably 104 but not less than 103 individuals per millilitre, and 

should consist of at least 5 species from at least 3 different phyla/divisions; 

.3 heterotrophic bacteria should be present in a density of at least 104

 living 

bacteria per millilitre; and 

 

5

 For example, if one set of test cycles is carried out at >32 PSU and a second set at 3-32 PSU, the test cycle 

in the 3-32 PSU range needs to be at least 10 PSU less than the lowest salinity used in the test cycle in 

the >32 PSU range.
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.4 the variety of organisms in the test water should be documented according to 

the size classes mentioned above regardless if natural organism assemblages or 

cultured organisms were used to meet the density and organism variety 

requirements. 

2.3.21 The following bacteria do not need to be added to the influent water, but should be 

measured at the influent and at the time of discharge: 

.1 Coliform; 

.2 Enterococcus group; 

.3 Vibrio cholerae; and 

.4 Heterotrophic bacteria. 

2.3.22 If cultured test organisms are used, then it should be ensured that local applicable 

quarantine regulations are taken into account during culturing and discharge. 

Land-based monitoring and sampling 

2.3.23 Change of numbers of test organisms by treatment and during storage in the 

simulated ballast tank should be measured using methods described in Part 4 of the annex, 

paragraphs 4.5 to 4.7. 

2.3.24 It should be verified that the treatment equipment performs within its specified 

parameters, such as power consumption and flow rate, during the test cycle. 

2.3.25 Environmental parameters such as pH, temperature, salinity, dissolved oxygen, TSS, 

DOC, POC and turbidity (NTU)6

 should be measured at the same time that the samples 

described are taken. 

2.3.26 Samples during the test should be taken at the following times and locations: 

immediately before the treatment equipment, immediately after the treatment equipment and 

upon discharge. 

2.3.27 The control and treatment cycles may be run simultaneously or sequentially. Control 

samples are to be taken in the same manner as the equipment test as prescribed in 

paragraph 2.3.26 and upon influent and discharge. A series of examples are included 

in figure 1. 

2.3.28 Facilities or arrangements for sampling should be provided to ensure representative 

samples of treated and control water can be taken that introduce as little adverse effects as 

possible on the organisms. 

2.3.29 Samples described in paragraphs 2.3.26 and 2.3.27 should be collected in triplicate 

on each occasion. 

 

6

 NTU=Nominal Turbidity Unit. 
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2.3.30 Separate samples should be collected for: 

.1 organisms of greater than or equal to 50 micrometres or more in minimum 

dimension; 

.2 organisms greater than or equal to 10 micrometres and less 

than 50 micrometres in minimum dimension; 

.3 for coliform, enterococcus group, Vibrio cholerae and heterotrophic bacteria; 

and 

.4 toxicity testing of treated water, from the discharge, for BWMS that make use 

of Active Substances and also for those BWMS that do not make use 

of Active Substances or Preparations but which could reasonably be expected to 

result in changes to the chemical composition of the treated water such that 

adverse impacts to receiving waters might occur upon discharge. 

2.3.31 For the comparison of organisms of greater than or equal to 50 micrometres or more 

in minimum dimension against the D-2 standard, at least 20 litres of influent water 

and l cubic metre of treated water, in triplicate respectively, should be collected. If samples 

are concentrated for enumeration, the samples should be concentrated using a sieve no 

greater than 50 micrometres mesh in the diagonal dimension. 

2.3.32 For the evaluation of organisms greater than or equal to 10 micrometres and less 

than 50 micrometres in minimum dimension, at least 1 litre of influent water and at 

least 10 litres of treated water should be collected. If samples are concentrated 

for enumeration, the samples should be concentrated using a sieve no greater 

than 10 micrometres mesh in the diagonal dimension. 

2.3.33 For the evaluation of bacteria, at least 500 millilitres of influent and treated water 

should be collected in sterile bottles. 

2.3.34 The samples should be analysed as soon as possible after sampling, and analysed live 

within 6 hours or treated in such a way so as to ensure that proper analysis can be performed. 

2.3.35 The efficacy of a proposed system should be tested by means of standard scientific 

methodology in the form of controlled experimentation, i.e. “experiments”. Specifically, the 

effect of the BWMS on organism concentration in ballast water should be tested by 

comparing treated ballast water, i.e. “treated groups”, to untreated “control groups”, 

such that: 

.1 one experiment should consist of a comparison between control water and treated 

water. Multiple samples, but at a minimum of three, of control and treated water 

within a single test cycle should be taken to obtain a good statistical estimate of 

the conditions within the water during that experiment. Multiple samples taken 

during a single test cycle should not be treated as independent measures in the 

statistical evaluation of treatment effect, to avoid “pseudo-replication”. 
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2.3.36 If in any test cycle the average discharge results from the control water is a 

concentration less than or equal to 10 times the values in regulation D-2.1, the test cycle is 

invalid. 

2.3.37 Statistical analysis of BWMS performance should consist of t-tests, or similar statistical 

tests, comparing control and treated water. The comparison between control and treated water 

will provide a test of unexpected mortality in the control water, indicating the effect of an 

uncontrolled source of mortality in the testing arrangement. 

2.4 Reporting of test results 

2.4.1 After approval tests have been completed, a report should be submitted to 

the Administration. This report should include information regarding the test design, 

methods of analysis and the results of these analyses. 

2.4.2 The results of biological efficacy testing of the BWMS should be accepted if during the 

land-based and shipboard testing conducted as specified in sections 2.2 and 2.3 of this annex it is 

shown that the system has met the standard in regulation D-2 in all test cycles as provided in 

paragraph 4.7 below. 

PART 3 –- SPECIFICATION FOR ENVIRONMENTAL TESTING FOR APPROVAL 

OF BALLAST WATER MANAGEMENT SYSTEMS 

Test specifications 

3.1 The electrical and electronic sections of BWMS in the standard production 

configuration should be subjected to the programme of environmental tests set out in this 

specification at a laboratory approved for the purpose by the Administration or by the 

competent authority of the manufacturer’s home country. 

3.2 Evidence of successful compliance with the environmental tests below should be 

submitted to the Administration by the manufacturer together with the application for 

type approval. 

Test specification details 

3.3 Equipment should operate satisfactorily on completion of each of the operating 

environment tests listed below. 

Vibration tests 

3.4 A resonance search should be made over the following ranges of oscillation frequency 

and amplitude: 

.1 2 to 13.3 Hz with a vibration amplitude of 1 mm; and 

.2 13.2 to 80 Hz with an acceleration amplitude of 0.7 g. 

This search should be made in each of the three orthogonal planes at a rate sufficiently low to 

permit resonance detection. 
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3.5 The equipment should be vibrated in the above-mentioned planes at each major 

resonant frequency for a period of two hours. 

3.6 In the absence of any resonant frequency, the equipment should be vibrated in each of 

the planes at 30 Hz with an acceleration of 0.7 g for a period of two hours. 

3.7 After completion of the tests specified in paragraph 3.5 or 3.6 a search should again be 

made for resonance and there should be no significant change in the vibration pattern. 

Temperature tests 

3.8 Equipment that may be installed in exposed areas on the open deck, or in an enclosed 

space not environmentally controlled should be subjected, for a period of not less than 

two hours, to: 

.1 a low temperature test at -25°C; and 

.2 a high temperature test at 55°C. 

3.9 Equipment that may be installed in an enclosed space that is environmentally 

controlled including an engine-room should be subjected, for a period of not less than 

two hours, to: 

.1 a low temperature test at 0°C; and 

.2 a high temperature test at 55°C. 

3.10 At the end of each of the tests referred to in the subparagraphs above, the equipment 

should be switched on and it should function normally under the test conditions. 

Humidity tests 

3.11 Equipment should be left switched off for a period of two hours at a temperature 

of 55°C in an atmosphere with a relative humidity of 90%. At the end of this period, the 

equipment should be switched on and should operate satisfactorily for one hour under the test 

conditions. 

Tests for protection against heavy seas 

3.12 Equipment that may be installed in exposed areas on the open deck should be 

subjected to tests for protection against heavy seas in accordance with 1P 56 of 

publication IEC 529 or its equivalent. 

Fluctuation in power supply 

3.13 Equipment should operate satisfactorily with: 

.1 a voltage variation of +/- 10% together with a simultaneous frequency 

variation of +/- 5%; and 
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.2 a transient voltage of +/- 20% together with a simultaneous frequency transient 

of +/- 10%, with a transient recovery time of three seconds. 

Inclination test 

3.14 The BWMS should be designed to operate when the ship is upright and when inclined 

at any angle of list up to and including 15° either way under static conditions and 22.5° under 

dynamic conditions (rolling) either way and simultaneously inclined dynamically 

(pitching) 7.5° by bow or stern. The Administration may permit deviation from these angles, 

taking into consideration the type, size and service conditions of the ship and operational 

functioning of the equipment. Any deviation permitted is to be documented in 

the Type Approval Certificate. 

Reliability of electrical and electronic equipment 

3.15 The electrical and electronic components of the equipment should be of a quality 

guaranteed by the manufacturer and suitable for their intended purpose. 

PART 4 – SAMPLE ANALYSIS METHODS FOR THE DETERMINATION OF 

BIOLOGICAL CONSTITUENTS IN BALLAST WATER 

Sample processing and analysis 

4.1 Samples taken during testing of BWMS are likely to contain a wide taxonomic diversity 

of organisms, varying greatly in size and susceptibilities to damage from sampling and analysis. 

4.2 When available, widely accepted standard methods for the collection, handling 

(including concentration), storage, and analysis of samples should be used. These methods 

should be clearly cited and described in test plans and reports. This includes methods for 

detecting, enumerating, and identifying organisms and for determining viability (as defined in 

these Guidelines). 

4.3 When standard methods are not available for particular organisms or taxonomic groups, 

methods that are developed for use should be described in detail in test plans and reports. 

The descriptive documentation should include any experiments needed to validate the use of 

the methods. 

4.4 Given the complexity in samples of natural and treated water, the required rarity of 

organisms in treated samples under regulation D-2, and the expense and time requirements of 

current standard methods, it is likely that several new approaches will be developed for the 

analyses of the composition, concentration, and viability of organisms in samples of ballast 

water. Administrations/Parties are encouraged to share information concerning methods for the 

analysis of ballast water samples, using existing scientific venues, and papers distributed through 

the Organization. 

Sample analysis for determining efficacy in meeting the discharge standard 

4.5 Sample analysis is meant to determine the species composition and the number of 

viable organisms in the sample. Different samples may be taken for determination of 

viability and for species composition. 
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4.6 Viability of an organism can be determined through live/dead judgement by 

appropriate methods including, but not limited to: morphological change, mobility, staining 

using vital dyes or molecular techniques. 

4.7 A treatment test cycle should be deemed successful if: 

.1 it is valid in accordance with paragraph 2.2.2.5 or 2.3.36 as appropriate; 

.2 the average density of organisms greater than or equal to 50 micrometres in 

minimum diameter in the replicate samples is less than 10 viable organisms per 

cubic metre; 

.3 the average density of organisms less than 50 micrometres and greater than or 

equal to 10 micrometres in minimum diameter in the replicate samples is less 

than 10 viable organisms per millilitre; 

.4 the average density of Vibrio cholerae (serotypes O1 and O139) is less 

than 1 cfu per 100 millilitres, or less than 1 cfu per 1 gramme (wet weight) 

zooplankton samples; 

.5 the average density of E. coli in the replicate samples is less than 250 cfu 

per 100 millilitres; and 

.6 the average density of intestinal Enterococci in the replicate samples is less 

than 100 cfu per 100 millilitres. 

4.8 It is recommended that a non-exhaustive list of standard methods and innovative research 

techniques be considered7

. 

Sample analysis for determining eco-toxicological acceptability of discharge 

4.9 Toxicity tests of the treated water discharge should be conducted in accordance with 

paragraphs 5.2.3 to 5.2.7 of the Procedure for approval of ballast water management systems that 

make use of Active Substances, as revised (resolution MEPC.169(57)). 

 

7

 Suggested sources may include but not be limited to: 

.1 The Handbook of Standard Methods For the Analysis of Water and Waste Water. 

.2 ISO standard methods. 

.3 UNESCO standard methods. 

.4 World Health Organization. 

.5 American Society of Testing and Materials (ASTM) standard methods. 

.6 United States EPA standard methods. 

.7 Research papers published in peer-reviewed scientific journals. 

.8 MEPC documents. 
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APPENDIX 

BADGE OR CIPHER NAME OF ADMINISTRATION 

TYPE APPROVAL CERTIFICATE OF BALLAST WATER MANAGEMENT SYSTEM 

This is to certify that the ballast water management system listed below has been examined 

and tested in accordance with the requirements of the specifications contained in 

the Guidelines contained in IMO resolution MEPC...(..). This certificate is valid only for 

the ballast water management system referred to below. 

Ballast water management system supplied by .................................................................... 

under type and model designation ....................................................................................... 

and incorporating: 

Ballast water management system manufactured by ............................................................ 

to equipment/assembly drawing No. ............................................ date ............................... 

Other equipment manufactured by ....................................................................................... 

to equipment/assembly drawing No. ............................................ date ............................... 

Treatment rated capacity ............................................................ m3

/h 

A copy of this Type Approval Certificate, should be carried on board a vessel fitted with 

this ballast water management system at all times. A reference to the test protocol and a 

copy of the test results should be available for inspection on board the vessel. 

If the Type Approval Certificate is issued based on approval by another Administration, 

reference to that Type Approval Certificate shall be made. 

Limiting Conditions imposed are described in the appendix to this document. 

Official stamp Signed ..................................................................................... 

Administration of ..................................................................... 

Dated this ............... day of .................................... 20.......... 

Enc. Copy of the original test results. 
MEPC 58/23 

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Figure 1 Diagrammatic arrangement of possible land-based tests 

*** 

5

4

SOURCE

2

3

4

4

6

4 4

1. Pump 4. Sample tanks 

2. Feed Tank 5. Treatment System 

3. Feed Line 6. Simulated Ballast Water Tank 

5

6 6

SOURCE

2

4

4 4

In-tank

In Line

4

1

6

1 3