>"Helles" 0.5l+ is the only allowed beer and you have to meet a "Trachten" quota (traditional clothing)

Well, the thing is: 0.5L is considered to be too much today for most, lots of locations are switching to 0.33 longneck bottles (esp. the ones with younger folks, also you can price it cheaper)

Regarding trachten quote: Do you have a link here?