Lawyers for outgoing Primary Health Care chief executive Peter Gregg have appeared in court over allegations he falsified documents when working for Leighton Holdings in relation to payments worth $15 million.

The Australian Securities and Investments Commission alleges Gregg twice breached a section of the Corporation Act in relation to falsifying books during his time as an executive at construction firm Leighton in 2011. One of the charges relates to Gregg’s instructions concerning two payments totalling $15 million to be made…