1. The seal of the association shall be in the custody of the secretary-treasurer, and shall not be affixed to any instrument except by the authority of a resolution of the executive council and in the presence of the president or a vice-president and of the secretary-treasurer, and the president, or a vice-president, and the secretary-treasurer shall sign every instrument to which the seal of the association is so affixed.

The seal of the association shall bear the device of a......

and shall have legibly engraved upon it the registered name of the association.