(1) To qualify for EAS the exchanges in an exchange-to-exchange EAS must be adjoining. Exchanges within a designated region must be contiguous to the region (within or adjoining at some point) .

(2) When implemented, exchange-to-exchange or regional, EAS shall be mandatory (not optional) and shall be two way between the affected exchanges.

(3) These rules do not affect the status of any existing EAS program, but will be applied to expansion or modification of such programs, exchange-to-exchange and regional.