After a disaster response period, if a responding out-of-state business or a responding out-of-state employee remains in this state:
(1) Such business or individual loses the protections of this part; and
(2) For purposes of computing franchise and excise tax imposed by title 67, chapter 4, parts 20 and 21, and the business tax imposed by title 67, chapter 4, part 7, the computation must include in the tax base net or gross income or receipts from activities transacted during the disaster response period.