AST's policy
None of this appears to be ritual, and none of it is shocking, new, different, or OMG WTF. There's a prohibition against letters around alcohol 'abuse' but not 'use.' There's a prohibition against social events at bars, but it's not clear if that only applies to going to a bar that's otherwise open, or renting out the space and using it with a cash bar.
Sorority members over 21 may drink and chapters may have alcohol at events.
Seems pretty standard to me. (And if you'd like it pulled down, I will, but as I said, it does not appear to be ritual material.)