N.H. Rev. Stat. Ann. § 169-A:7

In addition to any procedure established by the interstate commission under RSA 169-A:2 for the return of any runaway juvenile, the particular states, the juvenile or his or her parents, the courts, or other legal custodian involved may agree upon and adopt any other plan or procedure legally authorized under the laws of this state and the other respective party states for the return of any such runaway juvenile.