Section 38. If a city or town which has authorized the acquisition of such a plant subsequently votes to establish, purchase, reconstruct, extend or enlarge a plant, or to issue bonds, notes or certificates of indebtedness on account thereof, or to regulate the management or conduct thereof, or to adopt an ordinance or by-law relative thereto, the city or town clerk shall, within ten days after such vote, transmit to the department a certified copy thereof.