RSA 263:56 Authority to Suspend or Revoke License.

I. In addition to any other authority provided by law, the director is hereby authorized to revoke or suspend any license, permit or certificate issued under this title after a hearing upon a showing by its records or other sufficient evidence that the driver or boat operator:
(a) Has committed an offense for which mandatory revocation of license is required upon conviction;
(b) Has been convicted with such frequency of serious offenses against traffic regulations governing the movement of vehicles as to indicate a disrespect for traffic laws and a disregard for the safety of other persons on the highways;
(c) Is an habitually reckless or negligent driver of a motor vehicle, as established by the point system set up pursuant to paragraph II, by a record of accident