Shipping venomous on Delta

I ship about 5-10 times a year in San Antonio, Texas. Several years ago you had to have a rep from Delta view your facility and approve you as a certified shipper. Now you just show up and send the package. I use a styrofoam box inside a 1/4" plywood outside box. snakes are put into the styro box inside a reptile bag and then inside a deli cup style container. I'm not sure when they changed this certification detail, but you no longer have to get certified. A lot of ads on here state "not certified to ship" when in reality anyone can ship as long as the venomous are properly crated. I also was told by someone up north that the airport there refused to accept live reptiles of any kind even though Delta's policy is to accept them if properly crated. I'd be on the phone raising holy hell if they ever told me this.