SGF chief executive John Drummond said shopworkers faced increase risk of intimidation and violence from 16 and 17-year-olds unaware of the change, which is due to come into effect on Oct 1.
Drummond said: “Instead of undertaking an advertising campaign or working with youngsters in schools to kick the habit, the Scottish government has been paralysed by procedure.
“It is shopworkers, not the police or politicians who will be expected to enforce the law. Unlike in England, where the government has been working to get the message out there, all we have heard is a deafening silence.”
The SGF said it would support members with door posters and staff briefings about the changes.