(a) When required.--A water supplier shall require, as a condition of allowing a connection to the supplier's system, that the person requesting or applying for the connection certify that the materials used in the construction of the plumbing system to be connected are lead free.

(b) Refusal of connection.--A water supplier shall refuse connection to any person who is in violation of section 5 or who fails to provide the certification required under this section.

(c) Exemption from certification.--A person requesting or applying for the connection shall be exempted from the requirements of subsection (a) if the municipality within which the connection is to be made has adopted the Building Officials and Code Administrators (BOCA) National Plumbing Code of 1987, or another plumbing or building code which sets forth lead-free requirements which are consistent with the provisions of this act. The water supplier shall determine which municipalities within its service areas have adopted ordinances which set forth lead-free requirements consistent with the provisions of this act. For municipalities which have not adopted such ordinance, the water suppliers shall require certification in accordance with the provisions of this section. For municipalities which have adopted such ordinance, no certification shall be required.