Title 6 — Planning and Zoning Chapter 6.52 — SUPPLEMENTAL PLANNING REQUIREMENTS Walnut Zoning Code · 2026-06 edition · ingested 2026-07-07 · Walnut In this part Article I — Water Efficient Landscaping Article II — Transportation and Air Quality Control Measures Article III — Land Use Analysis Program Article IV — Recycling Locations for Development Projects Article V — Oak/Walnut Tree Preservation