Each accommodation space and service space in a ship shall comply with all the provisions stipulated in one of the paragraphs (a), (b), (c) or (d) of this Regulation:
| (a) | When a ship is being considered for acceptance in the context of Method I, a network of noncombustible “B” Class bulkheads shall be provided in substantial compliance with Regulation 30 (a) 1948) together with maximum use of noncombustible materials in compliance with Regulation 39 (a) (1948). |
| (b) | When a ship is being considered for acceptance in the context of Method II— |
| (i) | an automatic sprinkler and fire alarm system shall be provided which shall be in substantial compliance with Regulations 42 and 48 (1948); and |
| (ii) | the use of combustible materials of all kinds shall be reduced as far as is reasonable and practicable. |
| (c) | When a ship is being considered for acceptance in the context of Method III, a network of fire-retarding bulkheads shall be fitted from deck to deck in substantial compliance with Regulation 30 (b) (1948), together with an automatic fire detection system in substantial compliance with Regulation 43 (1948). The use of combustible and highly inflammable materials shall be restricted as prescribed in Regulation 39(b) and 40(g) (1948). Departure from the requirements of Regulations 39(b) and 40(g) (1948) may be permitted if a fire patrol is provided at intervals not exceeding 20 minutes. |
| (d) | when a ship is being considered for acceptance in the context of Method III— |
| (i) | additional “A” Class divisions shall be provided within the accommodation spaces in order to reduce in these spaces the mean length of the main vertical zones to about 20 metres (65,5 feet); and |
| (ii) | an automatic fire detection system shall be provided in substantial compliance with Regulation 43 (1948); and |
| (iii) | all exposed surfaces, and their coatings, of corridor and cabin bulkheads in accommodation spaces shall be of limited flame-spreading power; and |
| (iv) | the use of combustible materials shall be restricted as prescribed in Regulation 39 (b) (1948). Departure from the requirements of Regulation 39(b) (1948) may be permitted if a fire patrol is provided at intervals not exceeding 20 minutes; and |
| (v) | additional noncombustible “B” Class divisions shall be fitted from deck to deck forming a network of fire-retarding bulkheads within which the area of any compartment, except public spaces, will in general not exceed 300 square metres (3 200 square feet). |
