Section 147.40 - Materials requiring Commandant (CG-ENG) approval(a) Commandant (CG-ENG) approval is required before the following hazardous materials may be on board a vessel as ships' stores: (1) Poison gases of Class 2, Division 2.3 and toxic liquids of Class 6, Division 6.1 which are poisonous by inhalation in Hazard Zone A.(2) Explosives of Divisions 1.1 or 1.2.(3) Flammable gases, other than those addressed specifically in this subpart.(4) Forbidden materials listed in 49 CFR 172.101 .(b) Request for approval must be submitted to the Commandant (CG-ENG), identify the material, and explain the need for its use.(c) Upon approval, the material is added to the list of materials approved under this section. A copy of this list is available from the Commandant (CG-ENG) at the address in § 147.5 .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; CGD 97-057, 62 FR 51048, Sept. 30, 1997; USCG-2013-0671, 78 FR 60154, Sept. 30, 2013; USCG-2021-0348, 87 FR 3225, Jan. 21, 2022 USCG-2021-0348, 87 FR 3225, 1/21/2022