You would be correct.. we resign our commissions and/or are released from service. Since I haven't looked for my DD214 (from active duty) in years, and am still officially "IRR", I'm not sure what my release would look like (probably a board letter). Since I hit 24 years, I should be seeing something in the mail soon.
SFS
COAST GUARD PERSONNEL MANUAL CHAPTER 1.B.
1.B.7. Security Investigations for Original Appointment of Reserve Officers
Selectees must initiate a National Agency Check and sign the following Statement of Understanding before commissioning.
I understand a National Agency Check will be conducted to determine my qualification for commissioning as a United States Coast Guard officer. I understand my commission may be revoked and I may be separated in accordance with 10 U.S.C. 1162 or 14 U.S.C. 281 if it is determined I am not eligible for a secret security clearance.
Thank you for your reply, I should not have written my comment the way I did with upper case letters. I could have made my point without typing it that way. It made it look confrontational which is what I was not trying to do. I regret writing it that way and if I caused anyone to think I was dengrating anyone's service I am very sorry.