Chapter 13.15 CROSS-CONNECTIONS This chapter is included in your selections. Sections: 13.15.010 Purpose. 13.15.020 Authority. 13.15.030 Responsibility. 13.15.040 Definitions. 13.15.050 Administration. 13.15.060 Requirements. 13.15.070 Degree of hazard. 13.15.080 Existing in-use backflow prevention devices. 13.15.090 Periodic testing. 13.15.100 Records. 13.15.110 Fees and charges.