(1) The following general permits are created for the trimming of mangroves that do not qualify for an exemption provided by s. 403.9326:(a) A general permit to trim mangroves for riparian property owners, if:1. The trimming is conducted in an area where the department has not delegated the authority to regulate mangroves to a local government;
2. The trimming is supervised or conducted exclusively by a professional mangrove trimmer;
3. The mangroves subject to trimming under the permit do not extend more than 500 feet waterward as measured from the trunk of the most landward mangrove tree in a direction perpendicular to the shoreline;
4. No more than 65 percent of the mangroves along the shoreline which exceed 6 feet in pretrimmed height as measured from the substrate will be trimmed, and no mangrove will be trimmed so that the overall height of any mangrove is reduced to less than 6 feet as measured from the substrate; and
5. No herbicide or other chemical will be used for the purpose of removing leaves of a mangrove.
(b) A general permit for the limited trimming of mangroves within existing navigational channels, basins, or canals to provide clearance for navigation of watercraft, if:1. The trimming is conducted in an area where the department has not delegated the authority to regulate mangroves to a local government;
2. The trimming is supervised or conducted exclusively by a professional mangrove trimmer;
3. The mangroves are located on lands owned or controlled by the professional mangrove trimmer or by the person contracting with the professional mangrove trimmer to perform the trimming activities, or on sovereign submerged lands immediately waterward and perpendicular to such lands;
4. The trimming is limited to those portions of branches or trunks of mangroves which extend into the navigation channel beyond a vertical plane of the most waterward prop root or root system; and
5. No herbicide or other chemical will be used for the purpose of removing leaves of a mangrove.
(2) The department may establish additional general permits for mangrove trimming.
(3) The general permits under this section are subject to the following conditions:(a) A general permit may be used only once on any parcel of property to achieve a mangrove height of no less than 6 feet;
(b) Trimming must be conducted in stages so that no more than 25 percent of the foliage is removed annually; and
(c) The height and configuration of mangroves trimmed under these general permits may be maintained under s. 403.9326(1)(d). (4) Notice of intent to use a general permit must be made in writing to the department and must contain sufficient information to enable the department to determine the scope of the proposed trimming and whether the activity will comply with the conditions of this section.
(5) The department shall grant or deny in writing each request for a general permit within 30 days after receipt, unless the applicant agrees to an extension. If the applicant does not agree to an extension and the department fails to act on the request within the 30-day period, the request is approved. The department’s denial of a request for a general permit is subject to review under chapter 120. The department’s action may not receive a presumption of validity in any administrative or judicial proceeding for review.
(6) Trimming that does not qualify for an exemption under s. 403.9326 or a general permit under this section requires a permit as provided in s. 403.9328. (7) If a local government receives delegation of the department’s authority to regulate mangroves, the delegated local government shall issue permits for mangrove trimming in lieu of a general permit from the department, but the local government may not directly or indirectly limit the use of the exemptions in s. 403.9326. A delegated local government may impose stricter substantive standards than those of the department for the issuance of a permit authorized by this section; however, such regulations may not prohibit all mangrove trimming. 
