Hi,
No rules as far as I am aware of. However, having a a toddler to take care of might be really time consuming as rush, the new member program, and being a DZ sister requires a LOT of dedication and time. I am also not sure about your University, and the living requirements Delta Zeta has to fill a house if there is one.

I think that Delta Zeta sisterhood should be diverse and ageless (I pledged when I was 21), but being married and having a 16 month old myself, I don't know where I would find the time for it. But that is just me. I am sure that anyone who has weighed the options of being in a sorority and is positive that they can handle the committment would be an asset in every way!

Good Luck!
Tracy