A State grant under this program may be used by a local government for the following eligible work: Conversion of a public building or part of a public building for use as a senior center; Acquisition of an existing building or part of an existing building for use as a senior center; Renovation of a senior center; Purchase of capital equipment for a senior center; Planning, design, and construction of a senior center; Architects' and engineers' fees in connection with §A(1)—(5) of this regulation; A subgrant by a local government agency to a nonprofit organization for a purpose stated in §A(1)—(6) of this regulation; and Development of a comprehensive master plan for elderly citizen activities centers in a political subdivision. Funds available under Authorization Acts of certain years are restricted to certain of the purposes listed in §A of this regulation. The Department will apply funds available under those Acts for the purposes authorized by the Acts. Use of Part of a Building as a Senior Center. If an existing or proposed senior center shares or will share a building with any other group or agency, the grant may be used only to perform eligible work for that area of the building designated for use as a senior center. After completion of a project, the senior center may be used by other agencies or groups, if that use does not interfere with the operation of the senior center and is otherwise permissible under federal and State law.