No. 18 Tanzania Communications (ii) letters delivered by an employee of the sender;, (iii) letters delivered by a messenger employed by the sender especially for the purpose, not being a person employed or engaged in the course of his business or employment in delivering or procuring the delivery of letters; (iv) letters exceeding two kilograms in weight per letter; (v) letters concerning goods sent with the goods and delivered therewith; (vi) letters carried to or from a post office; (vii) letters carried in accordance with an agreement entered into by the licensee; (viii) transfers between document exchanges; (ix) letters carried to the premises of a provider of electronic mail services for the purposes of being transmitted as electronic mail, or letters carried from the premises of such a person after having been so transmitted; (x) letters carried and delivered by a private friend without hire, reward or other profit; and (xi) letters carried and delivered personally by the sender. (2) If any question arises as to whether or not any postal article is a letter within the meaning of this Act, the decision of the Commission thereon shall be final. 14.-(l) The Commission may grant a licence on such terms and conditions and in consideration of such payments as it thinks fit to any person for the doing of any such act or the performance of any such service falling within Section 13(l) (a) and (b) as is specified in the licence; and anything done under and in accordance with a licence granted under this section shall not constitute an infringement of the privilege conferred by section 15. (2) A licence granted under subsection (1) may be granted either to any person, or class of persons or a particular person, and may include (without prejudice to the power to impose conditions conferred by that subsection) conditions requiring the payment to the Commission of a fee on the grant of the licence or the payment to the Commission of periodic fees during the currency of the licence or both of such amount as may be determined or under the licence. (3) A payment required by subsection (2) to be rendered to the Commission may be recovered by it in any court of competent jurisdiction as if it were a simple contract debt. (4) No person shall question whether the grant of a licence under subsection (1) was, or was not, effected with consent of or in accordance with the terms of a general authority given by the Commission; and the 1993 15 Licences to be issued unconditionally or subject to conditions