(2) The Department of Revenue shall by rule provide for the payment of estimated tax liability by a group of affiliated corporations filing a consolidated return.
(3) As used in ORS 314.505 to 314.525, the term "estimated tax liability" means the tax computed under ORS chapter 317 or 318 less the credits allowed for purposes of ORS chapter 317 or 318. [1973 c.292 §1; 1984 c.1 §16; 1993 c.730 §41; 1997 c.299 §5]