Regulation 31 is amended by omitting paragraph (b) and substituting the following paragraph:
“(b) in the case of noise being emitted from a sole occupancy unit of the kind referred to in paragraph 27 (2) (a), (b) or (c)—if the noise level in another sole occupancy unit of the kind in the building, on the units plan or in the other Crown lease mentioned in paragraph 27 (2) (c), exceeds 5 dB(A) below the zone noise standard for the noise zone for the land on which the building is situated is in; and”.