33 CFR §156.107

1. (a)The COTP may consider and approve alternative procedures, methods, or equipment standards to be used by a vessel or facility operator in lieu of any requirements in this part if:
   1. (1)Compliance with the requirement is economically or physically impractical;
   2. (2)The vessel or facility operator submits a written request for the alternative at least 30 days before operations under the alternative are proposed, unless the COTP authorizes a shorter time; and
   3. (3)The alternative provides an equivalent level of safety and protection from pollution by oil or hazardous material, which is documented in the request.
2. (b)The COTP takes final approval or disapproval action on any alternative requested, in writing, within 30 days of receipt of the request.