Housing officers have escalated their plans to disrupt next month's district council elections in protest at the Housing Authority's plan to privatise estate management.
A three-day work-to-rule has been planned during which election-related jobs will be rejected.
Earlier, a one-day strike had been planned on polling day - November 28.
The Alliance of Housing Department Staff Unions said yesterday the move was to show their anger about the Government's refusal to listen to them.
Alliance members would only do 'housing-related' jobs from November 26-28, protest organiser Lam Man-cheuk said.
'Monitoring of election advertisements or assemblies, keeping polling stations in order or other election-related jobs will not be done,' Mr Lam said.
The alliance represents 9,000 of the 14,500 officers in the department.