Except as otherwise provided in this title, an appointment of a licensed agent authorizes that person to sell, solicit, or negotiate any one or more of the classes of insurance (i) for which the agent is licensed in this Commonwealth and (ii) for which the appointing insurer is also licensed in this Commonwealth. However, an agent holding a license that includes both life and health and property and casualty authorities shall be required to obtain both a life and health and a property and casualty appointment if the agent intends to sell, solicit, or negotiate both types of insurance, and an insurer shall be required to appoint any such agent for both life and health and property and casualty if the insurer intends to authorize the agent to sell, solicit, or negotiate both types of insurance on its behalf.