N.H. Code Admin. R. Saf-C 204.16
(a) Upon receipt of information indicating that any person has been convicted of driving a vehicle after suspension or revocation of the driver's license, the commissioner shall, after notice and a hearing, extend the period of such suspension(s) or revocation(s) in effect for an additional period of the same duration, unless extenuating circumstances exist such as, but not limited to:
Source. #6337, eff 9-25-96 (from Saf-C 203.15); amd by #7349, eff 8-22-00; amd by #8174, INTERIM, eff 9-25-04, EXPIRES: 3-24-05; ss by #8230-B, eff 12-17-04; ss by #10395-B, eff 8-15-13