(1) "Low-efficiency plumbing fixture" means any of the following plumbing fixtures that is not a watersense-listed plumbing fixture:
(a) A lavatory faucet;
(b) A shower head;
(c) A flushing urinal; or
(d) A tank-type toilet or tank-type water closet.
(2) "Watersense-listed plumbing fixture" means a plumbing fixture or plumbing fixture fitting that has been:
(a) Tested by an accredited third-party certifying body or laboratory in accordance with the federal environmental protection agency's WaterSense program or an analogous successor program;
(b) Certified by the body or laboratory as meeting the performance and efficiency requirements of the program; and
(c) Authorized by the program to use its label.