California Code, Public Utilities Code - PUC § 10011.5

Whenever a business transaction of a public utility, as defined in Section 10001, furnishing electricity, gas, water service where the utility has 10,000 or more service connections, or telephone service is such that a personal appearance by a person is required by the utility and the person is unable to appear at the utility's place of business during the utility's usual business hours, then the utility shall provide a reasonable and convenient alternative to the person such as an appointment outside the utility's usual business hours or allowing the person to conduct the transaction by telephone, mail, or both.