A former high school principal facing sentencing for having sex with a 16-year-old student in 2007 has been charged with the aggravated sexual assault of another pupil one year earlier.

Frank Bailey, 44, former principal of a Christian school at Grafton in northern NSW, is now charged with having sexual intercourse with a teenage girl without her consent when she was under his care in August 2006.

Accused ... Frank Bailey. Credit:Grafton Daily Examiner

The charge was mentioned in Sydney's Central Local Court today, when Bailey's solicitor said she did not require him to be shown on audio-visual link from the jail where he is on remand.

On Thursday, he faced a sentencing hearing in Sydney's Downing Centre District Court after pleading guilty to five counts of sexual intercourse with a 16-year-old under his care in 2007.