THE former chief of the Central Narcotics Bureau (CNB), Ng Boon Gay, will go on trial from Sept 25, Channel NewsAsia reported last night.

It added that the hearing has been fixed for 18 days over the next three months, from Sept 25 to Nov 29.

A third pre-trial conference on the alleged sex-for-contracts case was held on Thursday.

Ng, 46, is claiming trial for four corruption charges, his lawyers said last month.

The four charges concern obtaining oral sex from Ms Cecilia Sue Siew Nang, 36, a sales manager with two IT vendors, between June and December last year.

This was allegedly in exchange for helping her companies in their bids for CNB contracts.

His lawyers had been pressing the prosecution to give more details since he was charged in court on June 12.

Specifically, they wanted the State to clarify the supposed corrupt acts after the alleged trysts between Ng and Ms Sue.

They also sought more information on the exact business interests of Hitachi Data Systems and Oracle Corporation Singapore that were allegedly furthered.

His lawyers also claimed last month that the charges were "too general" and did not state what the alleged corrupt acts were or what business interests were involved.

His case has received widespread attention since news of a probe against him by the Corrupt Practices Investigation Bureau broke in January.

Ng is the second top public servant to face corruption charges.

Former Singapore Civil Defence Force commissioner Peter Lim Sin Pang, 52, faces 10 charges involving different women in a separate sex-for-contracts case.