(2) The public contracting and purchasing requirements of ORS 279.835 to 279.855, 279C.005, 279C.100 to 279C.125 and 279C.300 to 279C.470 and ORS chapters 279A and 279B do not apply to contracts entered into by districts for the acquisition, construction, improvement or equipping of a renewable energy facility or for the purchase or sale of electricity, electrical capacity or renewable energy certificates. [Amended by 1957 c.334 §2; 1961 c.409 §1; 1985 c.474 §5; 2003 c.794 §222; 2007 c.301 §39; 2007 c.895 §10]