Administration, Permits, and Code Enforcement
Permits and Approvals
Administration questions test when a permit is required, who may perform work, and how the AHJ enforces the code. Know that a permit is generally required for new installation, alteration, and replacement of plumbing systems, with limited exceptions for minor repairs. Understand the roles of the licensed contractor, the owner-builder where allowed, and the inspector.
Enforcement Tools
Learn the difference between a notice of violation, a stop-work order, and a certificate of occupancy. A stop-work order halts work that is unsafe or unpermitted; a certificate of occupancy confirms the building is approved for its intended use. Traps include assuming a permit can be issued retroactively without penalty, or that an inspector can waive a code requirement.
Variances and Appeals
Know that the AHJ may grant alternatives only when equivalent protection is provided, and that appeals typically go to a board rather than to the inspector. A common trap is a question that asks whether an inspector may approve a deviation informally; the answer is generally no.
Rule of Thumb
When a question asks who has authority, the answer is usually the AHJ acting under the adopted code, not the contractor or the designer. Worked example: a contractor wants to substitute a smaller vent than the plan shows. The correct path is a revised plan or an approved alternative, not field judgment.