The tree protection regulations of Subtitle C, Chapter 4 shall only apply to those lots in the R-8 zone in Squares 2042, 2043, 2046, 2049, 2231, 2232, 2238, 2239, 2244 through 2248, 2250, 2258, 2272, and 2282.
To the extent that any person seeks permission for building or terrain alteration on a lot with a slope steeper than twenty-five percent (25%) or with "highly erodible land" as defined at 7 C.F.R. § 12.2(2005), a professional certification that the plans for alteration and/or construction will follow best geo-technical, structural engineering, and arboreal practices shall be supplied with the building permit application.
D.C. Mun. Regs. tit. 11, r. 11-D509