California Code, Public Utilities Code - PUC § 328.1

(a) “Basic gas service” includes transmission, storage for reliability of service, and distribution of natural gas, purchasing natural gas on behalf of a customer, revenue cycle services, and after-meter services.

(b) “Revenue cycle services” means metering services, billing the customer, collection, and related customer services.

(c) “After-meter services” includes, but is not limited to, leak investigation, inspecting customer piping and appliances, carbon monoxide investigation, pilot relighting, and high bill investigation.

(d) “Metering services” includes, but is not limited to, gas meter installation, meter maintenance, meter testing, collecting and processing consumption data, and all related services associated with the meter.