What are regulations for Fixed Fire Fighting System in Machinery Space?

1. in any machinery space of category-A, to which access is provided at a low level from an adjacent shaft tunnel there shall be provided in the shaft tunnel, on the side remote from that machinery space, a light steel screen-door which shall be capable of being operated from each side in addition to any water-tight door, 
2. there shall be provided:- 
   1. in each special category space a power ventilation system sufficient to give at least 10 air changes per hour; 
   2. in each cargo space other than special category spaces, intended for the carriage of motor vehicles with fuel in their tanks for their own propulsion, power ventilation system sufficient to give at least 10 air changes per hour for ship carrying more than 36 passengers and 6 air changes per hour for ships carrying less than 36 passengers ;           

(3) the power ventilation system referred to in sub-rule (2) shall be entirely separagraphte from other ventilation systems and shall be operated at all times when vehicles are in such spaces. Ventilation ducts serving such spaces capable of being effectively sealed shall be separagraphted for each such space. 

The system shall be capable of being controlled from a position outside such spaces.  In addition :-