A £150,000 fighting fund to challenge plans for a controversial waste incinerator in west Norfolk has been approved by councillors.
King's Lynn and West Norfolk Borough council's cabinet has agreed to set aside the money in the event of a legal battle against the county council.
The county council has approved the Saddlebow plant despite 98% of electors in a referendum voting against it.
The fighting fund plan was ratified by the full borough council earlier.
Earlier this month, borough councillors had condemned the county council's "undemocratic" move and recommended that the government should look at the case.
The county council has said it received a letter from the government stating it would only intervene if the issue was of national importance.
The £600m contract will be signed with Anglo-American company Cory Wheelabrator if it is ratified at a county council scrutiny committee meeting in May.
The authority said the plans would stop rubbish going to landfill while generating energy at the same time but opponents of the plans are worried about pollution.