The provisions of §§ 22-9-701 and 22-9-702, which provide for public entities to provide assistance and payments to persons displaced by the acquisition of real property in connection with programs and projects wholly or partially financed by federal funds and to do such other acts and follow such procedures and practices as may be necessary to comply with the provisions of Public Law 91-646, shall be applicable to all projects undertaken under the provisions of this subchapter.