Normally when I sign up I will send 1 e-mail to multiple locations. I send to whichever bases I think I ‘might’ be passing through. I do this because it’s easier to print this e-mail and bring it with me. I bring the e-mail with me because for some reason I might not be in the system. Sometimes things get hectic and they miss your message. With the copy I bring (hard copy or electronic copy) they will put me in the system as of the date of the e-mail I sent. I have had this happen to me a couple of times and I know others it has happened to. If you don’t use some of the bases that you applied to, no harm and no foul. Your name will simply fall off the list at the end of the 45 or 60 days, whichever is the case for the location you sent it to.