The Hall is the place where the items are tested. The Assay Mark is the statement of the highest purity standard the goods exceeded when tested or "assayed". The UK laws allow no downside tolerance, so the metal must be at least ..., rather than is .... . The "Hallmark" is the minimum of three elements, which hall or assay office, the purity assay, and Sponsor's Mark who submitted the item. Additional marks may now include the date letter, optional standard marks such as the sterling lion, and commemorative marks, and convention marks which indicate common controls across certain European Countries.