(a) Every electric supplier is prohibited from having or applying any rate, charge, or service rule or regulation which unreasonably discriminates against or in favor of (1) any member of a class of consumers as opposed to any other consumer who is or should be in the same class of consumers for such purposes, or (2) any class of its consumers as opposed to another class of consumers for such purposes, provided that this prohibition shall not apply to any rate, charge, or service rule or regulation relating solely to service rendered by a municipality to consumers whose premises are located within its limits as they existed on March 29, 1973.

(b) Notwithstanding any other provision of law, every electric supplier is prohibited from, directly or indirectly, by ordinance, law, policy, contract, rate, regulation, or otherwise:

(1) Requiring that a consumer receive retail electric service from such electric supplier as a condition for such consumer to receive from such electric supplier or any other person any goods or other services that are not reasonably related to the furnishing of retail electric service to such consumer's premises;

(2) Offering a consumer lesser charges or more favorable terms or conditions for retail electric service because of such consumer's receiving or agreeing to receive from such electric supplier any goods or other services that are not reasonably related to the furnishing of retail electric service to such consumer's premises;

(3) Imposing higher charges for any goods or other services that are not reasonably related to the furnishing of retail electric service to a consumer's premises because of such consumer's failure or refusal to receive retail electric service from that supplier; or

(4) Furnishing retail electric service to any premises which such electric supplier is not entitled to serve under this part.