Deputy Prime Minister John Prescott is being urged to hold a referendum in Cornwall over the make up of a regional assembly.
A poll revealed 72% in favour of a referendum
In a historic move, Cornwall county councillors voted for Mr Prescott to canvass the public, asking two questions.
One would be to gauge opinion on a South West assembly, the other would be based solely on a Cornwall assembly.
Councillors debated the subject for two hours at a special meeting and voted 47 for and two against.
The move followed a MORI telephone poll commissioned by the county council in six Cornish districts which revealed 72% in favour of holding a referendum on the issue.
More than 50,000 people have petitioned for a referendum to be held on the establishment of a devolved assembly for Cornwall.
But Mr Prescott has rejected Cornish assembly calls in the past, stating there can only be referendums on the government's current regional set-up, with its seven-county South West.
Last year the county council backed an elected regional assembly, "but not necessarily one" using the same boundary as a seven-county South West.
Cornish Constitutional Convention chairman Bert Biscoe, said: "We have too many councils, too much duplication.
"We need to improve the scope and powers of government focused on Cornwall.
"That is why we need a Cornish Assembly."