Chapter 21.05 ADOPTION AND AMENDMENTS This chapter is included in your selections. Sections: 21.05.010 Authority. 21.05.020 Purpose. 21.05.030 Number of amendments allowed per calendar year. 21.05.040 Initiation of amendment. 21.05.050 Processing and Planning Commission hearing. 21.05.060 Planning Commission recommendation. 21.05.070 Board of Supervisors hearing and decision.