11. Any city municipality having a population at the last Federal census not exceeding fifty thousand souls, or any town municipality, may order that the provisions of this act shall apply to it, by means of a by-law approved by the Commission municipale du Québec and by the Government.
No such by-law may be amended or repealed except upon complying with the same formalities.
R. S. 1964, c. 196, s. 11; 1977, c. 5, s. 14.