In Italy that threshold isn't a setting — it changes from one municipality to the next.

Three years old in Numana. Twelve in Naples. Fourteen in many. Eighteen in Bergamo, Milan and Piacenza. And there are municipalities where the exemption doesn't exist at all: a newborn pays.

Venice adds a 50% reduction between 10 and 16 — that teenager is neither exempt nor charged in full.

I'm writing this because "under 14" looks like a parameter and is actually a per-municipality rule. I read them on the acts, and I haven't found two that match.