N.H. Rev. Stat. Ann. § 200-A:10

The provisions of RSA 200-A:7 and 8 shall apply only to recipients whose enrollment in medical school commenced in 1972 or any year thereafter. Any recipient under the provisions of this chapter whose enrollment in medical school commenced prior to 1972 may voluntarily make repayment to the state of all or any part of the funds paid by the state in his behalf.