(a) A person must hold a license issued by the commission under Chapter 37, Water Code, if the person:
(1) sells, designs, installs, maintains, alters, repairs, or services an irrigation system;
(2) provides consulting services relating to an irrigation system;
(3) connects an irrigation system to a private or public, raw or potable water supply system or any water supply; or
(4) inspects an irrigation system for a municipality or water district.
(b) A person is ineligible for a license under Subsection (a)(4) if the person engages in or has a financial or advisory interest in an entity that engages in an activity under Subsection (a)(1), (2), or (3).