After a long inquiry, Sir Geoffrey yesterday released a discussion paper with a raft of recommendations for liquor law reform which will be studied by ministers.
"New Zealand has some serious problems with the use of alcohol," he said.
"Not everyone drinks in a manner that is harmful but the consequences of harmful drinking affect us all."
Sir Geoffrey said the evidence indicated heavy drinking and drunkenness were generating the most acute harm.
He wants public submissions on the discussion paper over the next three months.
The Law Commission's recommendations would have a significant impact on liquor laws if the Government decides to implement some or all of them. They include:
* Increase excise tax overall on alcohol or reduce it for low-alcohol products;
* Set a minimum price below which alcohol products can't be sold -- a measure being developed in Scotland;
* Splitting the purchase age, leaving it at 18 for on-licence and raising it to 20 for off-licence;
* Making it an offence for an adult to supply liquor to a young person unless it is at a private social gathering and the adult has the consent of the young person's parent or guardian;
* Putting the Liquor Licensing Authority under a District Court Judge and increasing its powers to monitor trends and obtain data;
* Strengthen law enforcement by giving senior police officers the power to close bars; and
* Consider making it an infringement offence to drink in a public place.