Sections of Sydney’s CBD could become smoke-free zones in 2015 if a new proposal is approved by the City of Sydney council.

The proposal put forward by Tony Abbott’s sister, Liberal councillor Christine Forster, would apply to Sydney’s popular shopping strip Martin Place, according to a News Corp report.

• New warning for smokers
• Up in smoke — a child’s right to good health

If approved, a full-time ranger would enforce the cigarette ban.

Ms Forster said she expected to get the numbers for the 12-month trial to go ahead and, if successful, would look at expanding the smoke-free zone.

“If it is successful I would look at a motion to expand the ban to Pitt St Mall,” Ms Forster said.

“Martin Place is our premier civic open space and an appropriate place to run this trial.”

A survey found, depending on the time of day, three to eight per cent of people in Martin Place were smoking.

Ms Forster said she did not expect the ranger to issue fines to smokers, but rather inform them of the new smoke-free rule.

“I think it will be gently enforced by the ranger advising people they cannot smoke in Martin Place and by appropriate ‘no smoking’ signage,” she said.