Every recreational vessel required to be registered in Alabama or residence boat on the waters of this state having a marine sanitation device installed on board shall be inspected annually by the department in the county where the recreational vessel or residence boat is domiciled or located to assure that the recreational vessel or residence boat is in compliance with this chapter and department rules. When a recreational vessel or residence boat meets the requirements of the department, an annual inspection decal will be issued. This decal shall be placed on the port side of the hull of each recreational vessel and shall be placed on the residence boat in a position to be clearly visible from the water. The department may, at the request of a recreational vessel or residence boat owner and as part of an ongoing public educational program, conduct courtesy inspections of recreational vessels and residence boats for compliance with this chapter and may, in its sole discretion, provide warning citations under such circumstances as it deems appropriate. The department may, at the end of five years from October 1, 2003, establish by regulation, a reasonable fee not to exceed fifty dollars ($50) for the conduct of any mandatory annual inspections pertaining to this chapter, which fees shall be credited to the State Water Safety Fund.