(a) Counties with 200,000 or more inhabitants but fewer than 300,000 inhabitants, which border on the Mississippi River, may by ordinance set reasonable operating hours for all sanitary landfills and waste-to-energy facilities within their boundaries that receive wastes from sources off the site where such landfills or waste-to-energy facilities are located.
     (b) Beginning January 1, 1989, the Agency shall not grant any permit for the construction or operation of a solid waste disposal facility on a site which is held in a land trust, unless the application therefor has been signed by all beneficiaries of the land trust.