Unless specifically authorized under this code, a county commission shall not enact, and shall not enforce, any law, ordinance, regulation, or rule, requiring the licensing, certification, or registration of any person or business in order to practice or conduct a trade, occupation, or profession within the jurisdiction of the county: Provided, That this section shall not limit the authority of a county to impose or levy per project fees upon development projects and other forms of capital improvement affecting the county and its government.