Substantiation of expenses

The Secretary shall issue guidance requiring that the taxpayer substantiate the whaling expenses for which a deduction is claimed under this subsection, including by maintaining appropriate written records with respect to the time, place, date, amount, and nature of the expense, as well as the taxpayer’s eligibility for such deduction, and that (to the extent provided by the Secretary) such substantiation be provided as part of the taxpayer’s return of tax.