(11) Correction period (A) In general For purposes of subsection (d)(23), the term “correction period” means the 14-day period beginning on the date on which the disqualified person discovers, or reasonably should have discovered, that the transaction would (without regard to this paragraph and subsection (d)(23)) constitute a prohibited transaction. (B) Exceptions (i) Employer securities Subsection (d)(23) does not apply to any transaction between a plan and a plan sponsor or its affiliates that involves the acquisition or sale of an employer security (as defined in section 407(d)(1) of the Employee Retirement Income Security Act of 1974) or the acquisition, sale, or lease of employer real property (as defined in section 407(d)(2) of such Act). (ii) Knowing prohibited transaction In the case of any disqualified person, subsection (d)(23) does not apply to a transaction if, at the time the transaction is entered into, the disqualified person knew (or reasonably should have known) that the transaction would (without regard to this paragraph) constitute a prohibited transaction. (C) Abatement of tax where there is a correction If a transaction is not treated as a prohibited transaction by reason of subsection (d)(23), then no tax under subsections (a) and (b) shall be assessed with respect to such transaction, and if assessed the assessment shall be abated, and if collected shall be credited or refunded as an overpayment. (D) Definitions For purposes of this paragraph and subsection (d)(23)— (i) Security The term “security” has the meaning given such term by section 475(c)(2) (without regard to subparagraph (F)(iii) and the last sentence thereof). (ii) Commodity The term “commodity” has the meaning given such term by section 475(e)(2) (without regard to subparagraph (D)(iii) thereof). (iii) Correct The term “correct” means, with respect to a transaction— (I) to undo the transaction to the extent possible and in any case to make good to the plan or affected account any losses resulting from the transaction, and (II) to restore to the plan or affected account any profits made through the use of assets of the plan.