Abbreviate the ruling series

Error²Federal courts, Illinois courts21st and 22nd editions

A Social Security Ruling or Acquiescence Ruling is cited by the initialism table T1.2 gives for its series — “SSR” or “SSAR” — not by its spelled-out name.¹

1. 1T1.2 Social Security Administration (SSA). Tables: R. 14.2 Rules, Regulations, and Other Publications.
2. 2An error: the rule in note 1 allows one form, and this is not it.