(1) A "numeral mark" (limited four digits) may be used on the same side as the owner's recorded brand on cattle for individual identification. This mark may be used in addition to the "age tally mark" permitted in ARM 32.18.102.

(2) The "numeral mark" can only be used when the owner's recorded brand is on the animal(s). The use of this mark is not mandatory.

(3) When the "numeral mark" is used on cattle for individual identification a single letter may be used in conjunction therewith for the "age tally mark" for each year.