780 CMR, ch. 33, [F] 3313.1
An approved water supply for fire protection, either temporary or permanent, approved by the fire code official, shall be made available as soon as combustible building materials arrive on the site, on commencement of vertical combustible construction, and on installation of a standpipe system in buildings under construction, in accordance with Sections 3313.2 through 3313.5.
Exception: The fire code official is authorized to reduce the fire-flow requirements for isolated buildings or a group of buildings in rural areas or small communities where the development of full fire-flow requirements is impractical.
Where the fire safety plan indicates a water supply or fire flow exceeding the minimum provisions of this code, the fire safety plan shall be enforced.
780 CMR, ch. 33, [F] 3313.1