(a) Any requirement in this part may be waived on a case by case basis if it is determined by Commandant (CG-ENG) that the requirement is impracticable under the circumstances and that an acceptable level of safety can be maintained.(b) Requests for issuance of a waiver must be in writing and contain a detailed explanation of- (1) Why the requirement is impracticable; and(2) What measures will be taken to maintain an acceptable or equivalent level of safety.CGD 84-044, 53 FR 7749, Mar. 10, 1988, as amended by CGD 95-072, 60 FR 50465, Sept. 29, 1995; CGD 96-041, 61 FR 50731, Sept. 27, 1996; USCG-2013-0671, 78 FR 60154 , Sept. 30, 2013