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. 355512" N., Long. 1120405" W.; east to Lat. 355530" N., Long. 1114500" W.; to Lat. 355902" N., Long. 1113603" W.; north to Lat. 361530" N., Long. 1113606" W.; to Lat. 362449" N., Long. 1114745" W.; to Lat. 365223" N., Long. 1113310" W.; west-northwest to Lat. 365337" N., Long. 1113829" W.; southwest to Lat. 363502" N., Long. 1115328" W.; to Lat. 362130" N., Long. 1120003" W.; west-northwest to Lat. 363030" N., Long. 1123559" W.; southwest to Lat. 362446" N., Long. 1125110" W., thence west along the boundary of Grand Canyon National Park (GCNP) to Lat. 361408" N., Long. 1131007" W.; west-southwest to Lat. 360930" N., Long. 1140303" W.; southeast to Lat. 360511" N., Long. 1135846" W.; thence south along the boundary of GCNP to Lat. 355823" N., Long. 1135414" W.; north to Lat. 360010" N., Long. 1135348" W.; northeast to Lat. 360214" N., Long. 1135016" W.; to Lat. 360217" N., Long. 1135348" W.; northeast to Lat. 360214" N., Long. 1135016" W.; to Lat. 360217" N., Long. 1134911" W.; southeast to Lat. 360122" N., Long. 1134821" W.; to Lat. 355915" N., Long. 1134713" W.; to Lat. 355751" N., Long. 1134601" W.; to Lat. 355745" N., Long. 1134523" W.; southwest to Lat. 355448" N., Long. 1135024" W.; southeast to Lat. 354101" N., Long. 1133527" W.; thence clockwise via the 4.2-nautical mile radius of the Peach Springs VORTAC to Lat. 363853" N., Long. 1132749" W.; northeast to Lat. 354258" N., Long. 1131057" W.; north to Lat. 355751" N., Long. 1131106" W.; east to Lat. 355744" N., Long. 1121404" W.; thence clockwise via the 4.3-nautical mile radius of the Grand Canyon National Park Airport reference point (Lat. 355708" N., Long. 1120849" W.) to the point of origin. [Doc. No. 5926, 65 FR 17742, Apr. 4, 2000]