The usual order for Court Order is as follows...

TAO (Temporary Assessment Order) - 3 days long.
CAO (aka KO) (Court Assessment Order) - 4 weeks long but can be extended (although not usually extended)... DoCS regularly attempt to have them extended and are often successful but the orders may only be extended for 2 weeks and not the full 4 at the Magistrate's discretion.
CPO (Child Protection Order)- 3 months, 12 months, 2 years or until the child turns 18 years of age... These are also applied for in this order.Although is adaptable as DoCS think they are above the law.
PSO (Protective Supervision Order)- 6 months (usually) and applied for when the child is returned to the parent/s but DoCS still want to lord it over the family.

Everything from a CSO to a PSO is "adaptable". By this I mean that each order has a set life span, but DoCS will attempt to shorten/lengthen where they see fit.

With a CPO, if DoCS have already been previously granted a 3 month order on a child, they will bypass another 3 month order and either go for a 12 month order or a 2 year order. If they are granted a 2 year order - the parent needs to keep their nose very clean because DoCS will be looking to remove the child until he/she is 18 years of age if they become involved with the family again.