In heraldry, an armiger is a person entitled to use a heraldic achievement (e.g., bear arms, an "armour-bearer") either by hereditary right, grant, matriculation, or assumption of arms. Such a person is said to be armigerous.
Most of the time, the usage of a heraldic achievement is governed by legal restrictions; these restrictions are independent of the copyright status and independent of a coat of arms depiction. A coat of arms represents its owner. Though it can be freely represented, it cannot be appropriated, or used in such a way as to create a confusion with or a prejudice to its owner.