The special use regulations of this Section, inclusive, shall apply to buildings in the Special Enhanced Commercial Districts designated in Section 132-13 (Applicability of Special Use, Transparency, Street Wall and Parking Regulations), except as otherwise provided in Section 132-21 (Applicability of Use Regulations).

In all Special Enhanced Commercial Districts:

(a)        the finished floor of the ground floor level, for developments or ground floor level enlargements, shall be located not higher than two feet above, nor lower than two feet below, the as-built level of the adjacent sidewalk along a designated commercial street; and

(b)        where regulations apply to existing buildings in Special Enhanced Commercial Districts 2 and 3, constructed prior to June 28, 2012, the finished floor of the ground floor level shall be located not higher than five feet above, nor lower than five feet below, the as-built level of the adjacent sidewalk along a designated commercial street.