International Building Code Section 2901

International Building Code 2901.1

Scope. The provisions of this chapter and the International
Plumbing Code shall govern the erection, installation,
alteration, repairs, relocation, replacement, addition to, use or
maintenance of plumbing equipment and systems. Plumbing
systems and equipment shall be constructed, installed and
maintained in accordance with the International Plumbing
Code. Private sewage disposal systems shall conform to the
International Private Sewage Disposal Code.