Yup, 7 day opt out protects the member from PCS'ing within 2 years of a DOS because PCS's incur a 2 yr commitment. Say, you have one year left on your commitment and they non-vol you to Minot, you can 7 day opt out and stay at your current base until separation. Yet, often Wings that have a ton of non-vols to shit bases will track your 2 years to separation date so they can drop an assignment on you before the 7 day opt out becomes an option. Also, in rare instances, the AF could force you to move if you are within 2 years, but they cannot force you to extend your ADSC. Finally, someone who 7 day opts out is ripe for a 365 because the cards are shown. The best way to avoid all this is to try and time your PCSs such that your commitment expires at the end of a normal length tour.