Triggering Hawke's Bay's amalgamation referendum could be as simple as securing a couple of signatures on a piece of paper - or involve a major campaign to get thousands to sign a petition.
Either way, a binding poll to decide the future of local government in the region appears a certainty, with the pro-amalgamation camp saying it will support a process that could potentially derail its ambitions.
The Local Government Commission released its final amalgamation proposal on Tuesday, meaning the region's five councils will be merged late next year unless a majority of electors vote against the idea in a binding poll.
That poll will occur only if 10 per cent of those on the electoral role in any one of the affected council areas sign a petition demanding it.
Because the proposal involves a slight shift in Hawke's Bay's western boundary, the "affected areas" include rural pockets of the Taupo and Rangitikei districts.