CFR /  Title 14  /  Part 93  /  Sec. 93.152 Description of area.

Within that airspace below 3,000 feet MSL within the lateral boundary of the surface area of the Ketchikan Class E airspace regardless of whether that airspace is in effect. [Doc. No. FAA-2002-13235, 68 FR 9795, Feb. 28, 2003]