Every vessel licensed to operate under the provisions of this section shall be suitably equipped with an emergency medical kit containing such medical supplies as the board directs. Such medical kit shall be under the responsibility of the master. The vessel shall be subject to frequent inspections of the medical supplies in order to ensure their satisfactory condition and that the types and quantities of sup¬plies are maintained. The master of the vessel is required to keep a treatment book and in it enter all treatments and supplies used as justification for replenishing such supplies. All water containers, excepting closed water tanks, whether filled with fresh water or saltwater, shall be emptied once a week so as to destroy any mosquito larvae which they may contain.History: Bd. of Mar. lnsp. Regs,. eff 16 Oct 72, § 4.25.