(1) All local exchange carriers who offer preferred carrier freezes must, at a minimum, offer subscribers the following procedures for lifting a preferred carrier freeze:

(a) A local exchange carrier administering a preferred carrier freeze must accept a subscriber's written and signed authorization stating her or his intent to lift a preferred carrier freeze; and

(b) A local exchange carrier administering a preferred carrier freeze must accept a subscriber's oral authorization stating her or his intent to lift a preferred carrier freeze and must offer a mechanism that allows a submitting carrier to conduct a three-way conference call with the carrier administering the freeze and the subscriber in order to lift a freeze. When engaged in oral authorization to lift a preferred carrier freeze, the carrier administering the freeze shall confirm appropriate verification data (e.g., the subscriber's date of birth or social security number) and the subscriber's intent to lift the particular freeze.