2015 ORS § 161.535¹
Classification of felonies

(1) Felonies are classified for the purpose of sentence into the following categories:

(a) Class A felonies;

(b) Class B felonies;

(c) Class C felonies; and

(d) Unclassified felonies.

(2) The particular classification of each felony defined in the Oregon Criminal Code, except murder under ORS 163.115 (Murder) and treason under ORS 166.005 (Treason), is expressly designated in the section defining the crime. An offense defined outside this code which, because of the express sentence provided is within the definition of ORS 161.525 (Felony described), shall be considered an unclassified felony. [1971 c.743 §68]