Not exactly correct.

Basically, if you walk out of C/SR with a *trophy*, you earned a sweepstakes.

For Everyone:

Division 1 ratings at C/SR = 2 Event Sweepstakes

Add in a Div. 1 in marching (there are still a scant few JH/MS that march) = 3 Event Sweepstakes

Look at past results on Musicforms.com. Many of the sheets are marked "SWA" = 3 event HS Varsity, "SWB" = 2 event HS varsity OR MS/JH varsity 3 event. "SWC" = MS/JH 2 event OR HS-NV 2 event, etc.