N.H. Rev. Stat. § 651:17-a
Any person under the age of 18 who has been certified as an adult pursuant to RSA 169-B:24 and sentenced to the state prison pursuant to RSA 651:15 or to a county correctional facility pursuant to RSA 651:17, may be transferred to the youth development center established under RSA 621 for service of his or her sentence until he or she reaches the age of 18. Thereafter, any remaining portion of the sentence shall be served at the state prison or county correctional facility. The department of corrections, county correctional facilities, and the department of health and human services shall develop a memorandum of agreement which sets forth the roles and responsibilities of the parties when such a transfer occurs.
RSA 651:17-a
2016, 303:2, eff. July 1, 2016.