Bunbury City Council muzzled mayor David Smith in an emergency meeting yesterday after he called for an independent inquiry into the council's operations.
Internal conflicts at the South West council escalated this week after an email containing defamatory allegations about the mayor was leaked to the media.
Mr Smith called for the council to be suspended to enable an inquiry into relationships at the council but in yesterday's meeting, the council voted for chief executive Andrew Brien to act as the council's official spokesman.
It banned Mr Smith from speaking to the media until after the local government elections in October.
The council has been beset by controversy since it was revealed this month it had dropped fines issued to senior executives.
Mr Brien was caught driving in a nature reserve and chief financial officer Wayne Wright was fined for parking in an ACROD bay. Both fines were withdrawn, prompting a complaint to the Corruption and Crime Commission.
The commission referred the issue back to the council, which voted to drop the fines.
The council rejected Mr Smith's call for an inquiry.
"No councillor agrees with those statements," deputy mayor Stephen Craddock said.
Outside the closed-door council meeting Mr Smith said he would comply with the council's decision.The Department of Local Government has ruled out taking action on the council's conflicts.