Section 15. The city manager in cities having a plan D or plan E charter, the mayor in all other cities, except Boston, the town manager in towns having a town manager form of government and the selectmen in all other towns shall annually, in March, nominate one or more inspectors of animals, and before April first shall send to the director the name, address and occupation of each nominee. Such nominee shall not be appointed until approved by the director.
In a town which has a board of health and accepts this paragraph, the nomination of such inspectors shall be made by the board of health and not by the selectmen or town manager.