It shall be an unfair practice for an insurance producer initiating a sales presentation away from his or her office to fail to inform the prospective purchaser, prior to commencing the sales presentation, that the insurance producer is acting as an insurance producer, and to fail thereafter to inform the prospective purchaser of the full name of the insurance company whose product the insurance producer offers to the buyer. This rule shall apply to all lines of insurance and to all coverage solicited in this state including coverage under a group policy delivered in another state, whether or not membership in the group is also being solicited.