R.I. Gen. Laws § 23-16.1-2: When compact effective as to Rhode Island.

When the governor shall have executed the compact on behalf of this state and shall have caused a verified copy to be filed with the secretary of state, then the compact shall become operative and effective as between this state and the other state or states. The governor is authorized and directed to take any action that may be necessary to complete the exchange of official documents as between this and any other state executing the compact.