All loans purchased hereunder shall be to owners of real property in areas affected by a Conservation Plan approved by the municipality pursuant to the above named Acts, shall be conditioned upon full compliance by such owners with the terms and provisions of such approved Conservation Plan and shall be secured by a first mortgage note or notes and lien upon such real property, which mortgage shall be insured by the Federal Housing Commissioner of the United States of America against loss in accordance with the provisions of the National Housing Act of the United States in force at the time of the making of such loan.
65 ILCS 5/11-12.1-3