(1) (a) Where goods or services are supplied to a diplomatic mission, consulate, international organization or a member of the diplomatic or consular service or a member of his or her family forming part of his or her household, such mission, consulate, organization or member, as the case may be, may apply to the Comptroller within 2 years after the supply was made for a refund of the tax paid in respect of the goods or services, as the case may be.