No work of art financed or installed either wholly or in part with city funds or with grants procured by the city shall be loaned, displayed, or installed on privately owned property without a written agreement between the art in public places commission, acting on behalf of the City, and the owners, specifying the proprietary interests in the work of art and other provisions deemed necessary or desirable by the city attorney. In addition, such written agreements shall specify that the private property owner shall ensure that: