To exempt interior wall finishes in corridors from the application of Sentences 3.1.13.2.(1), 3.1.13.6.(1) and 3.1.13.6.(2), which would otherwise require certain maximum flame-spread ratings, if certain conditions are met, on the basis that these finishes will not significantly contribute to the spread of flame, and the condition imposed [sprinklering] will control the growth and spread of fire.