This subpart prescribes special operating rules for all persons operating aircraft in the following airspace, designated as the Grand Canyon National Park Special Flight Rules Area: That airspace extending from the surface up to but not including 18,000 feet MSL within an area bounded by a line beginning at Lat. 35°55′12″ N., Long. 112°04′05″ W.; east to Lat. 35°55′30″ N., Long. 111°45′00″ W.; to Lat. 35°59′02″ N., Long. 111°36′03″ W.; north to Lat. 36°15′30″ N., Long. 111°36′06″ W.; to Lat. 36°24′49″ N., Long. 111°47′45″ W.; to Lat. 36°52′23″ N., Long. 111°33′10″ W.; west-northwest to Lat. 36°53′37″ N., Long. 111°38′29″ W.; southwest to Lat. 36°35′02″ N., Long. 111°53′28″ W.; to Lat. 36°21′30″ N., Long. 112°00′03″ W.; west-northwest to Lat. 36°30′30″ N., Long. 112°35′59″ W.; southwest to Lat. 36°24′46″ N., Long. 112°51′10″ W., thence west along the boundary of Grand Canyon National Park (GCNP) to Lat. 36°14′08″ N., Long. 113°10′07″ W.; west-southwest to Lat. 36°09′30″ N., Long. 114°03′03″ W.; southeast to Lat. 36°05′11″ N., Long. 113°58′46″ W.; thence south along the boundary of GCNP to Lat. 35°58′23″ N., Long. 113°54′14″ W.; north to Lat. 36°00′10″ N., Long. 113°53′48″ W.; northeast to Lat. 36°02′14″ N., Long. 113°50′16″ W.; to Lat. 36°02′17″ N., Long. 113°53′48″ W.; northeast to Lat. 36°02′14″ N., Long. 113°50′16″ W.; to Lat. 36°02′17″ N., Long. 113°49′11″ W.; southeast to Lat. 36°01′22″ N., Long. 113°48′21″ W.; to Lat. 35°59′15″ N., Long. 113°47′13″ W.; to Lat. 35°57′51″ N., Long. 113°46′01″ W.; to Lat. 35°57′45″ N., Long. 113°45′23″ W.; southwest to Lat. 35°54′48″ N., Long. 113°50′24″ W.; southeast to Lat. 35°41′01″ N., Long. 113°35′27″ W.; thence clockwise via the 4.2-nautical mile radius of the Peach Springs VORTAC to Lat. 36°38′53″ N., Long. 113°27′49″ W.; northeast to Lat. 35°42′58″ N., Long. 113°10′57″ W.; north to Lat. 35°57′51″ N., Long. 113°11′06″ W.; east to Lat. 35°57′44″ N., Long. 112°14′04″ W.; thence clockwise via the 4.3-nautical mile radius of the Grand Canyon National Park Airport reference point (Lat. 35°57′08″ N., Long. 112°08′49″ W.) to the point of origin.