What is the best way to find out if you have been transferred to USNR-S2 status?
The easiest way is probably to go to a Commissary and see if your ID will get accepted by the required scan at the pay counter (either the self-checkout or the regular manned one).
Personally, being in the IRR, using my ID Card (DD Form 2 (Reserve)) I am allowed by the system to make purchases.
I imagine if the system now recognizes you as USNR-S2 (in other words, your transfer to USNR-S2 is now official) then it would deny you.
Per BUPERSINST 1001.39F 17 Sep 07:
1801. General. Per 10 U.S.C., 1063, Ready Reservists and their family members as well as Retired Reservists/Former Members (entitled to or receiving retired pay) and their family members are entitled to use commissary stores on the same basis as Active Duty members and their family members.
Standby Reservists (USNR-S1 and USNR-S2) and their family members are not entitled to commissary privileges. Retired Reservists who are not eligible for retired pay at or after age 60 are not entitled to commissary privileges.
1802. Access to Benefits. Members of the Navy Reserve and their family members will use their Armed Forces Identification Card for access to commissary facilities.
Here is what 10 U.S.C. 1063 says:
§1063. Use of commissary stores and MWR retail facilities: members of reserve components and reserve retirees under age 60
(a) Members of the Selected Reserve.-A member of the Selected Reserve in good standing (as determined by the Secretary concerned) shall be permitted to use commissary stores and MWR retail facilities on the same basis as members on active duty.
(b)
Members of Ready Reserve Not in Selected Reserve.-
Subject to such regulations as the Secretary of Defense may prescribe, a member of the Ready Reserve (
other than members of the Selected Reserve) may be permitted to use commissary stores and MWR retail facilities on the same basis as members serving on active duty.
(c) .....
Looks like SECDEF has a regulation that allows IRR (non-Selected Reserve), but not USNR-S1 and USNR-S2 (also non-Selected Reserve) Commissary privileges.
Just my stab at being a Sea Lawyer