Sorry for reviving quite an old thread... but for someone who might be searching for an answer. The uniform manual states that in order to grow a beard, approval must be sought from the CO; once that approval is received, a beard may be grown. You must cease shaving immediately and not sculpt the beard - with the exception of maintaining a clean neckline which is advised. The beard cannot have a bulk (distance from face, not length) exceeding 5cm and must be clean and neatly presented at all times. That isn't word for word, but the general gist is conveyed. There is a certain time period (I want to say four weeks but am not 100%) after which the beard is to be inspected for fullness or shaved off. A growing of a beard without a moustache is not permitted, and the growing of a beard without a moustache is not permitted. The beard must join both the moustache and the sideburns.