Except in an emergency, or if otherwise necessary for safety of flight, or unless otherwise authorized by the responsible Flight Standards Office for a purpose listed in § 93.309, no person may operate an aircraft in the Special Flight Rules Area at an altitude lower than the following:
(a) Minimum sector altitudes -
(1) Commercial air tours -
(i) Marble Canyon Sector. Lees Ferry to Boundary Ridge: 6,000 feet MSL.
(ii) Supai Sector. Boundary Ridge to Supai Point: 7,500 feet MSL.
(iii) Diamond Creek Sector. Supai Point to Diamond Creek: 6,500 feet MSL.
(iv) Pearce Ferry Sector. Diamond Creek to the Grand Wash Cliffs: 5,000 feet MSL.
(2) Transient and general aviation operations -
(i) Marble Canyon Sector. Lees Ferry to Boundary Ridge: 8,000 feet MSL.
(ii) Supai Sector. Boundary Ridge to Supai Point: 10,000 feet MSL.
(iii) Diamond Creek Sector. Supai Point to Diamond Creek: 9,000 feet MSL.
(iv) Pearce Ferry Sector. Diamond Creek to the Grand Wash Cliffs: 8,000 feet MSL.
(b) Minimum corridor altitudes -
(1) Commercial air tours -
(i) Zuni Point Corridors. 7,500 feet MSL.
(ii) Dragon Corridor. 7,500 feet MSL.
(2) Transient and general aviation operations -
(i) Zuni Point Corridor. 10,500 feet MSL.
(ii) Dragon Corridor. 10,500 feet MSL.
(iii) Tuckup Corridor. 10,500 feet MSL.
(iv) Fossil Canyon Corridor. 10,500 feet
[Doc. No. 28537, 61 FR 69330, Dec. 31, 1996, as amended by Amdt. 93-80, 65 FR 17742, 17743, Apr. 4, 2000; Amdt. 93-102, 83 FR 48212, Sept. 24, 2018]