The board of education of any school district may enter into an agreement with any private nonprofit organization or any public board, council or agency, which is authorized to provide meals for the aged by the secretary for aging and disability services acting as an agent of the federal government in establishing and administering food service programs for the aged under any federal law, which agreement may provide for use of school lunch facilities to be used for preparation and service of meals for the aged. Such meals may be served on or off of school premises and school district employees may participate in providing such services to the extent authorized by such an agreement. Nothing in this act shall be deemed to authorize diversion of any federal funds from the purpose for which the same are provided, nor to authorize the keeping of accounts of federal moneys in a manner contrary to any act of congress or rules or directives promulgated pursuant thereto.