- The local government should pass its own law declaring its own drinking age to be 18, state laws to the contrary notwithstanding.
- Repeal all local social host laws (if any) that pertain to 18-20 year olds.
- Declare the possession and consumption of alcohol by 18-20 year olds, and casual furnishing of alcohol to them, to be the lowest law-enforcement priority (LLEP), as long as no other laws are broken at the same time.
- Issue "protection passes" to anyone aged 18-20 who lives, works or attends school in that municipality, and make selling alcohol to such people the LLEP as well. Such passes would effectively enable their holders (and only their holders) to buy alcohol and enter bars in the town.
If enough local governments decide to do this, it would only be a matter of time before the drinking age is lowered. Just look at Denver and Seattle, for example, who made cannabis possession the LLEP long before their respective states decided to fully legalize it. And as they say, the rest is history.