Chapter 21.18 VESTING TENTATIVE MAPS This chapter is included in your selections. Sections: 21.18.010 Authority. 21.18.020 Purpose and intent. 21.18.030 Consistency. 21.18.040 Definition. 21.18.060 Filing and processing. 21.18.070 Fees. 21.18.080 Expiration. 21.18.090 Vesting on approval of vesting tentative map.