(A) Applicability. Unless exempt by division (B)(2) below, this subchapter shall apply to any land disturbing activity and to all new subdivisions, including the expansion or reconstruction of buildings and impervious surface areas existing on March 1, 2003 that occur within a buffer area of a protected waterway.
(B) Exemptions. The following developments shall be exempt from this subchapter’s standards:
(1) Agricultural operations, as defined in KRS 224.71-100 through 224.71-140;
(2) The expansion of the building footprint of a residential building existing on March 1, 2003 when the expansion is less than 50% of the building footprint on said date;
(3) The expansion of the building footprint of a non-residential building existing on March 1, 2003 when the expansion is less than 10% of the building footprint on that date;
(4) A legal lot of record zoned for one, and only one, single-family detached dwelling may be developed (subject to the development plan review procedures stated in Chapter 11, Part 6 of the Land Development Code) for one such dwelling; provided that the intrusion into the required buffer is the minimum necessary to accommodate the proposed use; and
(5) Docks, boat launches, structures which accommodate public water supply intake, water quality treatment plant sewer lines and outfalls, and other uses which, owing to their water dependent nature, cannot be located anywhere but within a designated buffer area.
(LDC § 4.8.2)