All natural features within a Special Natural Area District shall be protected by the regulations of this Chapter in accordance with the provisions set forth in Sections 105-02 (General Provisions), 105-30 (PRESERVATION OF NATURAL FEATURES) and 105-50 (REGULATIONS FOR PROTECTION OF NATURAL FEATURES).

Except for any existing natural feature that is unsafe and the removal of which is required by the Department of Buildings to eliminate hazardous conditions, no natural features described in Section 105-11 (Description of Natural Features) shall be removed, destroyed or altered unless permitted by certification, authorization or special permit of the City Planning Commission, pursuant to Section 105-40 (SPECIAL REVIEW PROVISIONS), or allowed pursuant to Section 105-021 (Actions not requiring special review).