SECTION 4. PROCEDURE

.01 General (1) Additional disclosure of facts relevant to, or positions taken with respect to, issues involving any of the items set forth below is unnecessary for purposes of reducing any understatement of income tax under section 6662(d) (except as otherwise provided in section 4.02(3) concerning Schedules M–1 and M–3), provided that the forms and attachments are completed in a clear manner and in accordance with their instructions.

(2) The money amounts entered on the forms must be verifiable, and the information on the return must be disclosed in the manner described below. For purposes of this revenue procedure, a number is verifiable if, on audit, the taxpayer can prove the origin of the amount (even if that number is not ultimately accepted by the Internal Revenue Service) and the taxpayer can show good faith in entering that number on the applicable form.

(3) The disclosure of an amount as provided in section 4.02 below is not adequate when the understatement arises from a transaction between related parties. If an entry may present a legal issue or controversy because of a related-party transac