Notice 2014-37 providing guidance on an amendment to reflect the outcome of United States v. Windsor, 570 U.S. ___, 133 S.Ct. 2675 (2013), that is adopted after the beginning of a plan year and is effective during a plan year (“mid-year amendment”) to a plan described in § 401(k)(12) or (13) (“§ 401(k) safe harbor plan”) or § 401(m)(11) or (12) (“§ 401(m) safe harbor plan”) of the Internal Revenue Code pursuant to Q&A-8 of Notice 2014-19, 2014-17 I.R.B. 979 (April 21, 2014).