[1] Liqueur Muscat essentially starts out being a late harvest wine with the grapes allowed to stay on the vine till they are in a partially raisined state.
[1] In 1995, a syndicate of producers in Rutherglen established a voluntary four-tier classification and regulation system for their Muscat wines based on age, sweetness and complexity.
At the highest end and meant to indicate a richer and more complex wine is the Rare Muscat.
Grand Muscat's average age is ten to fifteen years and has a residual sugar level of 270-400 g/L.
Rare Muscat is aged a minimum of twenty years and has a residual sugar level of 270-400 g/L.