(1) All animals retained at a roadside zoo or menagerie shall have been secured in a lawful manner. Evidence of such legal possession shall be kept on the premises for each animal maintained in such zoo or menagerie and shall be presented to any authorized officer upon demand. It shall be the purchaser's responsibility to obtain written verification that the individual disposing of any animals was legally entitled to make such disposition. Such verification shall be maintained with the other records and made available upon request.