If you are a paying guest they will probably let you in. If you have an annual pass, they may reserve the right to temporarily allow entry. This happened to me a few years ago. We arrived in the early afternoon till about 4, left the park to go have an early dinner at Knotts, when we came back about 7ish they had signs everywhere stating passholder restrictions untill 9pm. We were really upset because we were planning on watching the Lion King parade and now we were going to miss it. Luckily we complained enough that they finally let us in after waiting half an hour.
Remember! They DO have the right to change the rules.