This final rule implements Pub. L. 104-208, enacted on September 30, 1996, and Pub. L. 105-135, enacted on December 2, 1997, with respect to SBA financing in the 504 program, and clarifies existing regulations applicable to the 504 program and, in some cases, to the 7(a) program. In the 504 program, the final rule allows more than one business to qualify for SBA financing for a specific 504 Project; allows a 504 Borrower to lease long term up to 20 percent of the rentable space in a 504 Project; describes how much a Borrower must contribute to a 504 Project under certain circumstances; modifies allowable fees paid by the Borrower, Third Party Lender, and Certified Development Company (CDC); and allows certain fees incurred by a CDC in the closing of a 504 loan, up to $2,500 per closing, to be eligible administrative costs.