The mandatory requirement that social security numbers be included on forms filed with the Division of Workers Compensation is permitted by Section 7(a)(2)(B) of the Federal Privacy Act of 1974, since our regulations which require its disclosure were in existence before January 1, 1975. The number is used as a means of identifying all the various records in the Division of Workers Compensation pertaining to an individual. The use of social security numbers is made necessary because of the large number of applicants who have similar names and birth dates, and whose identities can only be distinguished by the social security number.