N.H. Rev. Stat. § 263:65
Upon a conviction of a violation of RSA 265:79, the court shall report to the department and shall immediately revoke the license or driving privilege of the person so convicted, or the right of a nonresident so convicted to drive within the state of New Hampshire; and said court in the case of holders of New Hampshire licenses shall return such license with its findings marked thereon, together with the court return, to the department; and the department may revoke the license of any person who shall be convicted of a similar offense by a court of any other state in a criminal proceeding, or who shall be found to have committed a similar act by a court of any other state in a civil proceeding.
RSA 263:65
1905, 86:10. 1911, 133:19. 1921, 119:18. 1923, 24:1. PL 102 :12. RL 118:13. 1951, 180:2, par. 13. 1951, 229:1. RSA 262:16. 1955, 109:3. 1963, 330:1. RSA 262-A:64. 1981, 146:1. 1983, 373:4. 1990, 219:7. 2006, 260:23, eff. Jan. 1, 2007.