[Code of Federal Regulations]
[Title 40, Volume 18]
[Revised as of July 1, 2003]
From the U.S. Government Printing Office via GPO Access
[CITE: 40CFR91.110]

[Page 303]
 
                   TITLE 40--PROTECTION OF ENVIRONMENT
 
         CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)
 
PART 91--CONTROL OF EMISSIONS FROM MARINE SPARK-IGNITION ENGINES--Table of 
Contents
 
       Subpart B--Emission Standards and Certification Provisions
 
Sec. 91.110  Requirement of certification--prohibited controls.

    (a) An engine may not be equipped with an emission control device, 
system, or element of design for the purpose of complying with emission 
standards if such device, system, or element of design will cause or 
contribute to an unreasonable risk to public health, welfare, or safety 
in its operation or function.
    (b) You may not design your engines with emission-control devices, 
systems, or elements of design that cause or contribute to an 
unreasonable risk to public health, welfare, or safety while operating. 
For example, this would apply if the engine emits a noxious or toxic 
substance it would otherwise not emit that contributes to such an 
unreasonable risk.

[61 FR 52102, Oct. 4, 1996, as amended at 67 FR 68340, Nov. 8, 2002]

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