The governing body of a governmental unit may by ordinance, or the governing bodies of two or more governmental units may by concurrent ordinances or agreement authorized by ordinance of each of the respective governmental units, create an electric authority, under any appropriate name and title containing the words “electric authority.” Upon compliance with the provisions of this section and §§ 15.2-5404 and 15.2-5405, the authority shall be a political subdivision of the Commonwealth and a body politic and corporate. Any such ordinance shall be adopted in accordance with applicable general or special laws or charter provisions providing for the adoption of ordinances of the particular governmental unit, and shall be published twice in a newspaper of general circulation within the governmental unit, with the first notice appearing no more than 28 days before and the second notice appearing no less than seven days before adoption. No governmental unit shall participate as a member of such an authority unless and until such participation is authorized by a majority of the voters voting in a referendum held in the governmental unit on the question of whether or not the governmental unit should participate in the authority. The referendum shall be held as provided in §§ 24.2-682 and 24.2-684. The foregoing referendum requirement shall not apply to the Town of Elkton if the Town creates an authority by an ordinance that includes articles of incorporation which comply with the provisions of § 15.2-5404 and also set forth a statement that such authority shall have only the Town as its sole member throughout its life.