Authorizations to Alter Natural Features
For a development, enlargement or site alteration located within the Special Natural Area District, the City Planning Commission may authorize:
(a) modification of topographic features including existing natural topography and topsoil pursuant to Section 105-421 (Modification of topographic features on Tier I sites) and modification of steep slopes pursuant to Section 105-422 (Authorization of a development, enlargement or site alteration on a Tier II site or portion of a zoning lot having a steep slope or steep slope buffer);
(c) modification of botanic environment, pursuant to Section 105-425;
(d) alteration of aquatic features, pursuant to Section 105-426 in NA-1, NA-2 and NA-3 Districts.
The Commission may prescribe appropriate additional conditions and safeguards to protect the character of the Special Natural Area District.