OR Const., Article XI-I1, Section 3

Refunding bonds. Refunding bonds may be issued and sold to refund any bonds issued under authority of sections 1 and 2 of this Article. There may be issued and outstanding at any time bonds aggregating the amount authorized by section 1 of this Article but at no time shall the total of all bonds outstanding, including refunding bonds, exceed the amount so authorized. [Created through S.J.R. 1, 1977, and adopted by the people Nov. 8, 1977]