Section 154.1200 - Mechanical ventilation system: General(a) Each cargo compressor room, pump room, gas-dangerous cargo control station, and space that contains cargo handling equipment must have a fixed, exhaust-type mechanical ventilation system.(b) The following must have a supply-type mechanical ventilation system: (1) Each space that contains electric motors for cargo handling equipment.(2) Each gas-safe cargo control station in the cargo area.(3) Each gas-safe space in the cargo area.(4) Each space that contains inert gas generators, except main machinery spaces.