This final rule establishes regulations for HUD's new Good Neighbor Next Door (GNND) Sales Program. The requirements for the new program are closely modeled on those for HUD's Officer Next Door (OND) and Teacher Next Door (TND) Sales Programs. The GNND Sales Program replaces and builds upon the success of these two existing sales programs. The purpose of the GNND Sales Program is to improve the quality of life in distressed urban communities by encouraging law enforcement officers, teachers, and firefighters/emergency medical technicians, whose daily responsibilities represent a nexus to the needs of the community, to purchase and live in homes in these communities. This final rule follows publication of a September 8, 2005, proposed rule and takes into consideration the public comments received on the proposed rule.