Chapter 18.150 PERMIT AND APPROVAL REVOCATION, MODIFICATION AND EXPIRATION This chapter is included in your selections. Sections: 18.150.010 Purpose. 18.150.020 Hearing Examiner's Authority. 18.150.030 Director's Authority. 18.150.040 Initiation of an Action. 18.150.050 Grounds for Revocation or Modification. 18.150.060 Expiration of Permit or Approval.