Beginning with the screening of "Friday After Next" on Thursday, students must obtain wristbands before gaining entry to the auditorium for sneak preview events.
"Because of what happened (Nov. 7), we've decided to open the auditorium doors earlier and hand out wristbands," said Charles Phaneuf, CUAB president.
Wristband distribution will begin outside the auditorium at 6 p.m., when doors open. Students presenting a UNC ONE Card will be entitled to receive two wristbands for the screening, which will begin at 8 p.m. Wristbands will not be required for regular movie events.
Prior to the Nov. 7 incident, students were able to gain entry to sneak previews by standing in line outside of the auditorium before the show began.
Phaneuf said the Union's old policy had never caused a problem.
"We've been showing sneak previews for eight years, and nothing like this has ever happened before," he said.
"We've shown big-name movies like 'High Fidelity' and 'American Beauty' and had no reason to think this screening would be any different."
But Nov. 7, students pushed and shoved their way to the front of the line to get into the auditorium, leaving many who had been in line for more than an hour unable to see the film.
Christopher Baker, a junior communications major and one of those students turned away from the screening, said he thinks the policy change will have a positive effect.