Notice 2021-51 announces that the Treasury Department and the IRS intend to amend certain regulations under sections 1446(a) and 1446(f) to defer the applicability date to January 1, 2023 for certain provisions relating to the following:  (i) withholding under section 1446(f) on transfers of interests in publicly traded partnerships (“PTP interests”); (ii) withholding under section 1446(a) on distributions made with respect to PTP interests; and (iii) withholding under section 1446(f)(4) by partnerships on distributions to transferees.   

Notice 2021-51 will be in:  2021-36, dated 8/22/2021.