Arce was charged with three counts of sexual battery, one count of battery and one count of false imprisonment, the L.A. City Attorney's Office said. The case involves one female student, according to the office.
Each is a misdemeanor charge. If convicted, Arce faces a maximum of 4 and a half years in jail.
Arce is a fourth-year international development studies major and serving as commissioner of the Undergraduate Students Association Council.
"The CSC is comprised of resilient students dedicated to service, civic engagement, and community empowerment, and as such, the Office of the President is confident that the office will to continue to effectively serve the Greater Los Angeles Area," the UCLA Community Service Commission said in a statement.
UCLA Police said a female student notified them she had been a victim of sexual battery over several months.
Arce was scheduled to be arraigned in Del Aire on Friday.