Tukituki National MP Craig Foss said: "The Bay is leading the charge against this stuff as we transition through to full enforcement. Maybe, at least in Hastings, it could be because the main shop selling is very central and visible."
The Hastings plan was also under way, Mr Foss said.
Mr McClay said the authority was writing to all local government chief executives yesterday, stressing the role councils could play through development of LAPPs and offering assistance with the process.
All licences, including interim licences, must adhere to LAPPs.
"Parliament was determined that councils have real authority to regulate where these products are sold in their regions and the Psychoactive Substances Act gives them precisely that power," said Mr McClay.
Further regulations are due for consultation in mid-February.
Legal high manufacturers now face an estimated $180,000 in application fees, plus $1 million to $2 million in testing costs for each product they wish to sell.