brewery_counter_effect

brewery_counter_effect = {
	county = {
		if = {
			limit = {
				has_variable = brewery_counter_var 
				NOT = {
					any_county_province = {
						has_building_or_higher = breweries_01
					}
				}
			}
			remove_variable = brewery_counter_var
		}
		else_if = {
			limit = {
				NOT = { has_variable = brewery_counter_var }
				any_county_province = { has_building_or_higher = breweries_01 }
			}
			set_variable = {
				name = brewery_counter_var
				value = current_year
			}
		}
	}
}

As written in game/common/scripted_effects/08_bp3_effects.txt.