(2) Each mobile telecommunications company and telephone exchange company shall be liable for the fee imposed, collected, or required to be paid, collected, or remitted under the provisions of paragraphs (1) and (2) of subsection a. of this section. Any such company shall have the same right in respect to collecting the fee from that company's customer or in respect to non-payment of the fee by the customer as if the fee were a part of the purchase price of the applicable telecommunications service or telephone exchange service, as the case may be, and payable at the same time; provided however, that the director shall be joined as a party in any action or proceeding brought to collect the fee. For purposes of this paragraph, "company" includes: an individual, partnership, corporation, or an officer, director, stockholder, or employee of a corporation, or a member or employee of a partnership, who as such officer, director, stockholder, employee, or member is under the duty to perform the act in respect of which the violation occurs.