Even though Congo achieved independence in 1960, the King of Belgium is still officially authorized to mobilize the military in ‘Belgian-Congo’, as well to ensure the protection of the country’s citizenry in the event of war. In times of peace, the King may even take such measures proactively.
Although not enforced in modern times, this law is still on the books. In fact, there is an annual ceremony of the Constable’s Dues, where the Royal Navy moors one of its boats alongside the Tower Pier and the captain delivers his “tax”.
In Leuven, Article 424 doesn’t literally provide that playing off-key, but it does state that a musical performance must not give rise to “a disturbance of the public order or peace”. However, local authorities have interpreted this provision to prohibit playing off-key.