Why has Victoria said no to the new Murray Darling Basin plan?

The federal government has delivered an updated plan for the management of the Murray Darling Basin, one of Australia's most complicated and important river systems. South Australia, Queensland and New South Wales have all agreed to the new plan - but Victoria has refused to sign on.

Murray Darling River system is both a source of food and a significant cultural practice for many First Nations communities. Source: AAP / DEAN LEWINS/AAPIMAGE