How to use this guide
Start with the official rule, inspection report or violation notice for your property. Use the linked product page to understand the physical item, then confirm the exact wording, dimensions, language, placement, listing, power source, mounting method and installation requirements before buying. A retail product can support compliance, but it does not replace an official certificate, agency-issued notice, permit, inspection, licensed trade or filing when those are required.
Primary official source: Philadelphia — Rent your property long-term ↗