The 27-year-old St George Illawarra Dragon forward voluntarily attended the station on Thursday afternoon after the alleged incident with a 19-year-old woman at a Wollongong unit on the weekend.
De Belin has been charged with one count of aggravated sexual assault in company and has been granted conditional bail to appear at Wollongong Local Court on February 12.
The NRL said the integrity unit has been advised and the league will allow the “legal process” to take its course.
The incident allegedly happened in the early hours of Sunday morning during a night out after the woman left a Wollongong establishment with a large group including de Belin, the Nine Network reported.
She reportedly hopped into a taxi with de Belin and a lower grade player and was under the impression they were headed to another club, but instead ended up at the apartment, Nine said.
The St George Illawarra Dragons have made the following statement regarding Jack de Belin.
— The Dragons (@NRL_Dragons) December 13, 2018