If the licensee is a corporation, the license issued to it entitles one officer thereof, on behalf of the corporation, to engage in the business of real estate broker without the payment of any further fee, such officer to be designated in the application of the corporation for a license. For each officer other than the officer so designated, through whom it engages in the business of real estate broker, the appropriate original or renewal fee is to be paid in addition to the fee paid by the corporation.