Claims of a registrant will be considered in inverse order of the listing of the classes below. When grounds are established to place a registrant in one or more of the classes listed in the following table, the registrant shall be classified in the lowest class for which he is determined to be eligible, with Class 1-A-O considered the highest class and Class 1-H considered the lowest class, according to the following table:
Code of Federal Regulations
[52 FR 24457, July 1, 1987]