Chapter 13.90 ADMINISTRATION AND ENFORCEMENT This chapter is included in your selections. Sections: 13.90.010 Building Official – Designated. 13.90.020 Interpretation. 13.90.030 Promulgation of regulations. 13.90.040 Building Official – Powers and duties. 13.90.050 Responsibility of owner. 13.90.060 Prohibitions. 13.90.070 Nonassumption, nonwaiver of liability.