after the first recertification, where does counting begin to determine the next physician's recertification date

A) no counting is required. the next recertification is due on or before the 44th day

B) the signature date of the first recertification and continues no later than 30 days.

C) the admission date and continues every 30 days there after

D) the next recertification can be signed at any time and backdated if necessary