66. Penalty for defiling or injuring letter boxes

Any person who —

places in or against any letter box any fire, match, light or any explosive, dangerous, filthy, noxious or deleterious substance of any fluid;

commits a nuisance in or against any such letter box; or

does anything likely to injure any such letter box or its appurtenances or contents, is guilty of an offence and liable on conviction to a fine and imprisonment for one year.