When I entered on 10/7 we were not asked to provide proof leaving. I will say that the C&I situation is a disgrace. We were treated like pieces of dirt even though we were bringing in relief supplies. We almost had to beg to get in. There was six people in the customs booth. One was sleeping, one was tuning out to his ear buds and three pretended we were not there. It took 45 minutes to clear six people with no one in front of us.
Bottom line is don't expect to be welcomed regardless of your intentions or paperwork.