Final answer:
Plumbing fixtures that receive discharge from indirect waste pipes must be approved by the building inspector before installation.
Step-by-step explanation:
No plumbing fixture that is receiving discharge from indirect waste pipes shall be installed until first approved by the building inspector.
The building inspector is responsible for ensuring that all plumbing installations comply with local regulations and standards.
This approval is necessary to ensure that the fixture is correctly installed and will not cause any plumbing or safety issues.