Substitutions for fittings, equipment, arrangements, calculations, information, or tests required in this subchapter may be approved by the Commandant, the Commanding Officer (MSC), Attn: Marine Safety Center, U.S. Coast Guard Stop 7410, 4200 Wilson Boulevard Suite 400, Arlington, VA 20598-7410, or the Officer in Charge, Marine Inspection, if the substitution provides an equivalent level of safety. [USCG-2007-29018, 72 FR 53968, Sept. 21, 2007, as amended by USCG-2009-0702, 74 FR 49239, Sept. 25, 2009; USCG-2013-0671, 78 FR 60163, Sept. 30, 2013]