Each mattress must comply with either:
(a) The Consumer Product Safety Commission Standard for Mattress Flammability (FF 4-72, Amended), 16 CFR part 1632, subpart A, and not contain polyurethane foam; or
(b) IMO Resolution A.688(17) (incorporated by reference, see § 136.112 of this subchapter) in which case the mattress may contain polyurethane foam.