Increasing part time hours

I work part time at a hospital run by Healthscope and have been doing lots more hours. Can I increase my permanent contracted hours to reflect this?

Clause 23(xi) of the Healthscope Group – NSWNMA/ANMF – NSW Nurses and Midwives’ – Enterprise Agreement 2015–2019, states that a part time employee can request to have their hours worked reviewed annually. If you are regularly working more than your contracted hours, then it can be agreed to change this to reflect the hours regularly worked. While agreement by the employer is not to be unreasonably withheld, it would not apply to hours arising from the absence of employees on, for example, long service leave, maternity leave or workers compensation nor any temporary increase in hours to meet the needs of a specific patient.