3 11. Hours or Bustness--Wurex Days. (1) (a) The Post Offices of the Presidency shall be opened to the public from 8 a.m, to 3.30 p.m on Mondays, Tuesdays, Wednesdays, Fridays and Saturdays, and from 8.00 am. to 11.80 a.m.on Vhursdays. (b) C.O.D., Money Order, Postal Order and Parcel Post business shall be conducted from 9 a.m. to 1% noon and 1.00 p.m. to 2.80 p.m, on Mondays, ‘Tueadiys, Wednesdays, Fridays and Saturdays, and from 9 a.m, to 11.00 am. on Thursdays: Provided thet whenever the arrival at the Presidency or the departure therefrom of any ship with mails occurs after the aforesaid hours of business the Craneral Post Olice and anv Branely Post Office of the Presideuey may remain open for the receipt and delivery of mails, for the despateh of mails and for the transaction of such other business as the Administrator may think necessary and expedient, for such time and dering such hours as he may direct. (2) Sunypays axp Hortpays. Whenever the arrival at the Presidency or the departure therefrom of any ship with mails falls on a Sunday ov public holiday, or the exigencies of the postal service require that business be transacted in the Presidency on a Sunday or a public holiday, the Gereral Post Office and any Branch Post Office of the Presidency may be opened on that day for the receipt and delivery of mails, for the despatch of mails and for the transaction of such other business as the Administrator may chink neeessary and expedient, for such time and during such hours as he may direct. 12. Am Mati Postacr. (1) The rates of postage on postal packets transmitted by air shall be as prescribed in Schedule C hereto. (2) Postal packets to be forwarded by air shall be marked “ By Air Mail” or “ Par Avion” at the top left-hand corner on the address side. (3) The postage shail be fully prepaid. If at least 75% of the air surcharge is prepaid, the postal packet will be taxed with an amount equivalent to double the deficiency and forwarded by air mail but if at least 75% of the air surcharge is not prepaid, the postal packet will be forwarded by surface means. 18. Surrace Matt Posracr. The prepaid rates of postage on postal packets (other than parcels) and the special rate of postage in respect of insured boxes intended for transmission from the Presidency by surface mail shall be as set forth in Schedule D hereto. 14. Miscennangous Services. The charges to be made for the miscellaneous services enumerated in Schedule E hereto sbal! be at the rates set forth in the said Sehedule.