L.1917, c. 152, Art. XX, s. 52, p. 396, 1924 Suppl. s. 136-2052; section 52 of Article XX of an act entitled “An act concerning municipalities,” approved March twenty-seventh, one thousand nine hundred and seventeen, as amended by “An act to amend an act entitled “An act concerning municipalities,’ approved March twenty-seventh, one thousand nine hundred and seventeen, and constituting chapter 152 of the pamphlet laws of 1917,” approved March thirty-first, one thousand nine hundred and twenty-one (L.1921, c. 129, p. 254), saved from repeal. [This section provides that work theretofore begun shall be completed under the provisions hereof.]