The affordable housing incentives for low-income households may be utilized for multi-family or single-family housing projects, including manufactured housing communities, within urban zones that include a minimum threshold of affordable units allocated for low-income households and other criteria as specified under each financial or regulatory incentive as listed in PCC 18A.65.040 and 18A.65.050. This Chapter shall not apply to proposed projects within the Residential Resource (RR) zone. Development proposals shall meet the design standards set forth in Title 18J PCC except as stipulated under the regulatory incentives of PCC 18A.65.050.