On November 4, 2021, the Tax Court issued a Memorandum Opinion in the case of Excelsior Aggregates v. Commissioner (T.C. Memo. 2021-125). The primary issue presented in Excelsior Aggregates was whether the IRS complied with the prior supervisory approval requirement of IRC § 6751(b)(1) with respect to the numerous penalties asserted against the petitioner (IRC § 6662A and IRC § 6662(a), (b)(1)-(3), (d), (e), and (h)). Held: Executive Summary from the Tax Court in Excelsior