The standard subscription order period is 12 months. If a permanent change of address during the subscription period means that copies have to be sent by a more expensive service, there will be no extra charge. Conversely, no refund will be made, nor expiry date extended, if a change of address allows the use of a cheaper service.

^{Please note that new subscriptions take about four weeks from receipt of order to become effective.
Cancelled subscriptions will be subject to a charge of 25% (twenty-five per cent) of the full subscription price or US $15, whichever is the higher, plus the cost of any issues already sent. Subscriptions can not be cancelled after they have run for six months or more.}