(b) If you use a credit card—

1. (1) On or before the due date, you must send or fax a written authorization, bearing your signature; or
2. (2) You may authorize BLM to use your credit card by telephone if you can satisfactorily establish your identity.

(c) You may send payments using a bona fide mail delivery service.

1. (1) The payment must be postmarked or clearly identified by the mail delivery service as being sent on or before the due date; and
2. (2) The BLM State Office must receive the payment no later than 15 calendar days after the due date.