Deferred recruitment is when first semester freshmen are not allowed to pledge a fraternity or sorority. At many schools, men and women go through NPC and NIC rush before they have even attended any classes - they are technically pre-freshmen.
When people "depledge" they are NOT initiated members. They are still in the process of pledging. Anyone who has been initiated into an NPC sorority and has their membership terminated or self-terminates may NOT join another NPC group ever. I won't speak for the NIC fraternities as their policies vary.
Hope that helped.
