A. How to Use This Part. This part of the Zoning Code contains the City’s regulations regarding residential development. RZC 21.08.020 through RZC 21.08.140 provide a summary description of each residential land use zone, including its permitted land uses and site requirements. RZC 21.08.150 through RZC 21.08.200 set forth general regulations governing development in all zones and explain the requirements in the zone use charts. RZC 21.08.210 through RZC 21.08.390 set forth requirements for specific development types, such as accessory dwelling units, cottage housing, and zero lot line development.