This rule is strictly adhered to in British armory, with only rare exceptions; Despite the fact that frequently noticed in continental heraldry, It's not necessarily adhered to quite as strictly. Arms which violate this rule are sometimes known as "puzzle arms", of which by far the most well known https://medievalflagpole31974.designi1.com/34910769/the-smart-trick-of-medieval-times-flags-that-nobody-is-discussing