ACT has changed the rules to bring them in line with NSW and Vic on respect to the Murrumbidgee. Click here for the announcement.

I found this was a little confusing in respect to local lakes so headed off to the rules. Which say:

Murray cod: closed season September to November. Legal size between 55cm and 75cm. Bag limit one within the open waters of the Murrumbidgee River, two in all other open waters.