To exempt buildings containing only 1 or 2 dwelling units and detached garages or accessory buildings from the requirements of Sentence 9.10.14.5.(6), if certain conditions are met, on the basis that detached garages and accessory buildings are considered an integral part of a dwelling unit, and such structures are generally very small and the incidence of fires in such structures in relation to house fires is low. There is insufficient risk, therefore, to require the spatial separation of a house from its garage or carport.