The ban needs to be enacted legislatively after market creation.
What counts:
- ban on distilled spirits only 
- ban for people born after a given date (simmilar to NZ tobacco ban) 
- extremely restrictive personal quotas (<20% average consumption prior to enactment) 
What does not:
- increasing drinking age 
- restricting sales to a small number of outlets 
- supreme court decision finding the sale of alcohol unconstitutional 
- anything a country with a theologically driven legislature does 
- an attempted ban that gets legally overturned before coming into effect 
All timeframes:
/CodeandSolder/will-any-country-at-least-partially-5fcd89487eee 
/CodeandSolder/will-any-country-at-least-partially 
/CodeandSolder/will-any-country-at-least-partially-db5c43829921 
/CodeandSolder/will-any-country-at-least-partially-b2acab53e843 
/CodeandSolder/will-any-country-at-least-partially-f942c2f9a355 
/CodeandSolder/will-any-country-at-least-partially-d31c8d2e6e56 
See also:
/CodeandSolder/will-any-country-legalize-recreatio 
/CodeandSolder/will-any-country-legalize-recreatio-1a525266f522
(and other timeframes)
@JosephNoonan because it's deciding it was illegal already, just nobody knew it, and not making it newly illegal
@Radicalia as far as I understand the division of powers as commonly implemented courts are not intended to hold legislative power but only judicial. The goal of the Supreme Court is thus to provide correct interpretation of legislation already in place, in theory not creating new laws. The practical implementation does seem to stray from that goal though. In any case arbitrary decisions of a few unelected people don't fit with my intention for this market.