Any farmer desirous of obtaining the benefit of Government cost-sharing in subsoiling under sections 51–55 of this title shall submit a request for such through the Board of Supervisors of the Virgin Islands Soil Conservation District. The said Board shall pass upon all such requests and submit its recommendations to the Commissioner of Agriculture for final determination by such Commissioner as to the sharing of costs by the Government. In addition to such other requirements or conditions as may be prescribed by the Commissioner of Agriculture, no subsoiling costs may be shared by the Government under said sections unless the request for cost-sharing and approval by the Commission is made prior to the undertaking of the subsoiling.