For purposes of this chapter and ORS chapters 316, 317 and 318:
(1)
“C corporation” means, with respect to any taxable year, a corporation which is not an S corporation for such year.
(2)
“S corporation” means, with respect to any taxable year, a corporation for which an election under section 1362(a) of the Internal Revenue Code is in effect for such year. [Formerly 314.730]