Under what circumstances will the court grant an extension of time under section 16 of the Family Provision Act 1982 (NSW)

In Durham v Durham [2010] NSWSC 389 Ball J said at 15:

An extension under that section may only be granted, relevantly, if sufficient cause is shown for the application not having been made within the prescribed period: s 16(3). Assuming that condition is satisfied, the Court has a discretion to grant an extension “having regard to all the circumstances”:s16(2). Matters that the Court should take into account include whether the beneficiaries under the Will would be unacceptably prejudiced if time were extended and whether there has been unconscionable conduct by any of the parties in connection with the delay: Massie v Laundy (7 February 1986, unreported, Young J).