State Policy for Courts.
Oregon Revised Statutes; § 1.001.
http://www.oregonlaws.org/ors/1.001
https://www.oregonlegislature.gov/bills_laws/ors/ors001.html

The Legislative Assembly hereby declares, that, as a matter of statewide concern, it is in the best interests of the people of this state, that, the judicial branch of state government, including the appellate, tax and circuit courts, be funded and operated at, the state level.

The Legislative Assembly finds that state funding and operation of the judicial branch can provide for best statewide allocation of governmental resources, according to the actual needs of the people, and of the judicial branch, by establishing an accountable, equitably funded, and uniformly administered system of justice, for all the people of this state.

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Supreme Court;
Chief Justice as administrative head of judicial department;
rules;
& presiding judges as administrative heads of courts.
Oregon Revised Statutes; § 1.002.
http://www.oregonlaws.org/ors/1.002

(1) The Supreme Court is the highest judicial tribunal of the judicial department of government in this state.
The
Chief Justice of the Supreme Court is the presiding judge of the court and the administrative head of the judicial department of government in this state.
The
Chief Justice shall exercise administrative authority and supervision over the courts of this state consistent with applicable provisions of law and the Oregon Rules of Civil Procedure. …

ORS § 1.001 & 1002. State Policy for Courts; Chief Justice is Administrative Head.