65 (c) the installation of letter boxes or receptacles by members of the public for the purpose of the delivery to them of postal articles and the disposal of postal articles addressed to members of the public who fail to install in the prescribed manner letter boxes or receptacles of a type prescribed; (d) the registration of postal articles, and in so doing provide for— (i) the classes of postal articles that may be registered; (ii) the maximum amount for which a postal article may be registered; (iii) the amount payable as compensation for the loss of a registered postal article or its contents; (e) the insurance of postal articles, and in so doing provide for— (i) the classes of postal articles that may be insured; (ii) the maximum amount for which a postal article may be insured; (iii) the amount payable as compensation for the loss of an insured postal article or its contents; (f) a money order service and in so doing provide for— (i) the maximum amount for which money orders may be issued; (ii) the period during which money orders shall remain current; (g) a postal order service, and in so doing provide for the manner in which and the conditions subject to which postal orders may be issued, paid and cancelled; (h) the establishment, maintenance, working and conduct of telecommunication services or systems, and in so doing— (i) provide in connection with a telegraph service for— A. the order of precedence of messages sent by telegraph service and the method of disposal of unclaimed and undelivered telegrams; B. the measures to be taken to prevent the improper interception or disclosure of messages sent by telegraph service; C. the period for which and the conditions subject to which telegrams and documents relating to telegrams that are in the custody of telegraph offices shall be preserved; (ii) provide in connection with telephone and telex services for— A. the conditions subject to which persons may use or avail themselves of telephone and telex services and facilities connected therewith; B. the supply, installation, maintenance and repair of such apparatus and equipment as may be necessary for the purposes of affording persons the use of telephone and telex services and facilities connected therewith and, if the nature of the apparatus or equipment so requires, for the working of the apparatus or equipment by a licensee; C. the conditions subject to which apparatus and equipment referred to in subparagraph B shall be supplied, installed, worked, whether by a licensee or otherwise, maintained and repaired;