Property owners or tenants who don't remove graffiti within two weeks after receiving notice from the city could be fined up to $500 under a proposal sent to the City Council on Monday. Councilman Adrian Garcia, chairman of the committee, said the change would help city officials enforce rules that require Houstonians to remove graffiti on their property in a timely manner. "People don't want to be at risk of getting a ticket," he said. Existing law requires property owners to abate graffiti within 30 days, or ask the city to do it.