SECTION 18. EFFECTIVE
Internal Revenue Bulletin 2013-1 · 2026-10-03 edition · updated 2026-10-04 · United States
DATE
Rev. Proc. 2012–4 is superseded.
This revenue procedure is effective January 2, 2013.
Sec. 18 2013–1 I.R.B. 159 January 2, 2013
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