(a) No person shall engage in, practice or offer to perform the work of a subsurface sewage disposal system installer, as defined in § 20-341a, or the work of a subsurface sewage disposal system cleaner, as defined in said section, unless he has first obtained an apprentice’s permit under subsection (b) of § 20-341d or a license under § 20-341e.

(b) The department shall furnish to each person who meets the requirements of this chapter, a license indicating that the holder is entitled to engage in the work or occupation of subsurface sewage disposal system installer or cleaner, and the holder of such license shall carry it on his person while engaging in such work or occupation. Such license shall be shown to any properly interested person on request. No license shall be transferred to or used by any person other than the person to whom the license was issued. A licensee shall display his state license number on all commercial vehicles used in his business. Each licensee shall inform customers in writing that his work is subject to regulation by the Department of Public Health and that inquiries and complaints concerning such work may be directed to the department.

(c) The department shall keep a register containing the names of all persons to whom such licenses are issued which shall be open to public inspection.

(d) The department may take action under § 19a-17 for any of the following reasons: (1) The license holder has employed or knowingly cooperated in fraud or material deception in order to obtain his license or has engaged in fraud or material deception in the course of professional services or activities; (2) illegal, incompetent or negligent conduct by a license holder in his work; or (3) violation of any provision of this chapter or any regulation adopted hereunder. The Commissioner of Public Health may petition the superior court for the judicial district of Hartford to enforce any action taken pursuant to § 19a-17.