The federal government denies it is harbouring a secret plan to delay and water down the national disability insurance scheme.

The government has secured support from the states to expand the scheme’s board, but rejects the move gives Canberra effective control.

A spokesman for Social Services Minister Christian Porter told AAP on Monday the government had no plans to change eligibility rules.

It also remained committed to funding the scheme and delivering it within budget.

“Given the complexity of this reform and the significant level of funding being invested, governments will continue to closely monitor scheme governance and scheme costs to ensure every dollar used is invested as efficiently and effectively as possible,” he said.

Opposition disability spokeswoman Jenny Macklin accused the government of having a secret plan to take control of the scheme.

Source: SBS.com.au