strictest sororities?

Chi o is the strictest, with very harsh social media rules and rules about when you are allowed to attend fraternity parties. They recently were under social probation and are more strict now calling girls to standards for being drunk. Ocassiobal sober periods.
Sigma kappa is also strict with posting alcohol on social media, but do not control where you can or cannot party and when. They are not allowed to pregame mixers but can drink at them and very rarely call girls to standards for actions at a party. The only sober period is for special occasions.
Kappa is relatively easy going about parties but strongly encourages girls to go to pike even on non-mixer days. They do not have rules about posting to social media and often pregame mixers. The only sober periods are for special occasions.
Sigma delta tau has a strict and relatively long sober period during pledging but after pledging is always down for a party
Aephi has weird rules about parties such as pledges not being allowed to talk to brothers. Random sober periods that seem to be a hassle. No social media rules though.

I think this person was asking about the pledging period. That's what the original reply seems to refer to. Also chi o is not that laid back. Thanks