Appearing before the Melbourne Magistrates' Court on Friday, Boulton responded "Guilty, Your Honour" when asked how he wished to plead. A third charge was struck out.
The charges stem from an incident in February 2025 at Monash University's law chambers. Police said at the time that "inappropriate images were inadvertently displayed during a university lecture." Boulton is no longer employed by the university.
Boulton, who also served as a senior deputy director of the Fair Work Commission, was previously granted bail and allowed to travel to Europe after his lawyers told a magistrate he had spent a "serious amount" on the trip. He declined to comment as he exited court.
His bail was extended, and he is scheduled to appear before the County Court on March 5 next year.