Air Letters

(1) The expression “Air Letter” in these Regulations means a postal packet consisting of a sheet of paper suitably folded and gummed, the size of which, in that form, shall be that of a postcard, and which is conveyed or intended to be conveyed by air, throughout any part of its course in the post, by an Air Mail (2) Air Letters the front of which must be marked with the word “Aerogramme” in addition to the word “Air Letter”, shall be written on either the stamped Air Letter forms obtainable from all post offices at the rates indicated in regulation 11, or on privately manufactured forms on which the appropriate rates of postage (prescribed in regulation 22(3)) must be prepaid either by means of postage stamps or a franking machine impression. (3) Air Letters shall not contain enclosures. Any Air Letter which contains an enclosure shall be treated as an ordinary air mail letter and surcharged accordingly. (e) Re-Direction