21. Extension: A pit or quarry may not be extended to a lot which is owned, on 17 August 1977, by any person other than the owner of the land on which such pit or quarry is located, if the effect of such extension is to put the operating side under the distances prescribed in sections 10 to 16 or if such pit or quarry is located in the territories enumerated in sections 10 and 57, unless the owner of the lot in which the extension is to take place on 17 August 1977 is a person allied to the owner of the land in which the pit or quarry is already located within the meaning of section 4 of the Act respecting bankruptcy and insolvency (R.S.C. 1985, c. B-3).
R.R.Q., 1981, c. Q-2, r. 2, s. 21.