Vega applied for and received a conventional mortgage loan from First Federal to finance the purchase of his residence. First Federal's deposits were insured by the Federal Savings and Loan Insurance Corporation (FSLIC). Which federal statute should First Federal pay close attention to before completing its loan agreement with Vega? What obligations are imposed on First Federal by this statute? See Vega v. First Federal Savings and Loan Association, 433 F. Supp. 624 (D. Mich. 1977). How would First Federal's obligations be affected if Vega sought to borrow money for the purchase of a commercial lot?