Periodically the Secretary shall review the operation of this arrangement, and shall propose such amendments to the arrangement as the Secretary believes are necessary or appropriate. Any State unemployment compensation agency or NASWA may propose amendments to the arrangement. Any proposal shall constitute an amendment to the arrangement upon approval by the Secretary in consultation with the State unemployment compensation agencies. Any such amendment shall specify when the change shall take effect, and to which claims it shall apply.
20 C.F.R. §616.11