Mass. Gen. Laws ch. 131B, § 7: Agreements or cooperative arrangements between participating state and nonparticipating state

Section 7. Except as expressly required by the interstate wildlife violator compact, the compact shall not affect the right of any participating state to apply its laws relating to license privileges to a person or circumstance or to invalidate or prevent an agreement or other cooperative arrangement between a participating state and a nonparticipating state concerning the enforcement of wildlife laws.