"Transitional area" is the area of land under an imaginary transitional surface of an airport, as described in 14 CFR Part 77.19(e). (Added by Amended Ord. 02-064, Dec. 9, 2002, Eff date Feb. 1, 2003; Amended by Amended Ord. 15-025, May 6, 2015, Eff date May 24, 2015).