New York Education Law Section 3315 - Member states, effective date and amendment.

  3315.  Member states, effective date and amendment. 1. Any state is
  eligible to become a member state.
2. The compact shall become effective  and  binding  upon  legislative
  enactment  of  the  compact  into law by no less than ten of the states.
  Thereafter it shall become effective and binding as to any other  member
  state  upon  enactment  of  the  compact  into  law  by  that state. The
  governors of non-member states or their designees shall  be  invited  to
  participate  in  the  activities  of  the  interstate  commission  on  a
  nonvoting basis prior to adoption of the compact by all states.
3. The interstate commission may propose amendments to the compact for
  enactment by the member states. No amendment shall become effective  and
  binding  upon the interstate commission and the member states unless and
  until it is enacted into law by unanimous consent of the member states.

Last modified: February 3, 2019