Mr Fowlie said if cannabis were made legal, its supply would come under the new Psychoactive Substances Act and the council's policy.
He said the policy would keep legal high stores out of Otara and Manurewa and most of Auckland's west and south by exclusion zones around schools and local shops and vulnerable communities based on social and economic deprivation ratings. However, the proposed policy had separate rules for the central city - the area inside the waterfront and the motorways - which was what the council did in its local policy for the sale of alcohol.
"We agree that the CBD should be treated differently because it is the entertainment hub. People come in here at night and weekends to enjoy themselves.
"But we disagree with the concept of exclusion zones based on a social deprivation index, which is not there in the alcohol policy."
Mr Fowlie said the council was trying to satisfy concerns raised by politicians and the Manurewa and Henderson local boards which did not want legal high outlets in their areas.
"This de facto prohibition will have the effect of encouraging alcohol use, 'tinny' shops selling cannabis and people getting into pills and potions.
"It will simply be exporting problems somewhere else, because people will travel across Auckland.
"We will have problematic customers from the rest of Auckland on our doorstep waiting to be served."
Mr Fowlie said the policy would allow outlets to open up at popular beach spots at Takapuna, Mission Bay or St Heliers. A concentration of outlets and problems could be avoided by restricting new city centre outlets to within 250m instead of 100m of an existing outlet.
Heart of the City central manager Tania Loveridge said some members expressed serious concerns about the return of legal highs, recalling aggressive and anti-social behaviour.
But the association was comfortable with a 100m rule because the number of licences was likely to be highly restricted.
Alcohol Health Watch adviser Amy Robinson questioned relaxing controls for this area, including 100m between retail outlets when 500m was proposed elsewhere.
Sale of legal highs
• 1454 written submissions on Auckland Council's draft policy on location of outlets
• 128 submitters for hearings starting today
• 73% of submitters support separate location rules for city centre
• 94% agree on banning sales licences in neighbourhood centres