On what conditions may an exemption certificate，exempting from the requirement to install a fixed fire extinguishing system in a cargo space，be issued？（）<br>A:The ship is constructed and solely intended for carriage of ore， coal， grain， unseasoned timber， non-combustible cargoes or cargoes which according to the Administration constitute a low fire risk<br>B:Steel hatch covers and effective means of closing all ventilators and other openings to the cargo space are fitted<br>C:A fixed deck foam system is be fitted in lieu of the cargo space extinguishing system<br>D:The vessel is less than 10 000 gross tonnage

On what conditions may an exemption certificate，exempting from the requirement to install a fixed fire extinguishing system in a cargo space，be issued？（）
A:The ship is constructed and solely intended for carriage of ore， coal， grain， unseasoned timber， non-combustible cargoes or cargoes which according to the Administration constitute a low fire risk
B:Steel hatch covers and effective means of closing all ventilators and other openings to the cargo space are fitted
C:A fixed deck foam system is be fitted in lieu of the cargo space extinguishing system
D:The vessel is less than 10 000 gross tonnage

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