Chapter 2.3 MIXED-USE ZONING DISTRICTS (ME, MR, PO, MU, AND MN) This chapter is included in your selections. Sections: 2.3.100 Purpose and Applicability. 2.3.200 Permitted and Conditional Uses. 2.3.300 Development Standards. 2.3.400 Site Layout and Building Orientation. 2.3.500 Architectural Standards. 2.3.600 Special Development Standards for the MR Zone.