Said board is hereby invested with full power to make and enforce such bylaws, regulations, and ordinances as may be necessary to carry into effect the object and intent of this act, and to enforce any and all resolutions, regulations, and ordinances which are now in force relating to the water works and electric plants, all of which resolutions and ordinances shall be deemed and considered as adopted by the board, and to be of full force and effect until they shall have been repealed, altered or amended by the board; and the board may supply any power or mode not already specified herein, and shall cause all bylaws, regulations, and ordinances to be entered and recorded in a book to be kept for that purpose, and signed by the president and secretary, which, when so entered, recorded, and signed shall be evidence in any court of justice; provided, that all resolutions, regulations, and ordinances heretofore passed by the city council of said city relating to the water works and electric plant shall be sufficiently recorded in said records by referring to the number and date of passage and approval of such regulations, resolutions, and ordinances.