Section 151 - Entry into force and withdrawal - Article XI1.Force and effect. This compact shall enter into force and effect immediately upon its enactment into law by any 2 states. Thereafter, it shall enter into force and effect as to any other state upon the enactment thereof by such state.2.Withdrawal. This compact shall continue in force with respect to a party state and remain binding upon such state until 6 months after such state has given notice to each other party state of the repeal thereof. Such withdrawal shall not be construed to relieve any party to a library agreement entered into pursuant to this compact from any obligation of that agreement prior to the end of its duration as provided therein.