The Governor may at any time declare that the Governor expects to be temporarily disabled for a period of time and will not be able to discharge the duties of the office during that period of time. The Governor shall indicate the date and time that the period of disability will commence, and an estimate of the length of time during which the Governor will be disabled. Upon the date and time specified by the Governor, the person charged with assuming the duties of the office under Article V, section 8a of the Oregon Constitution, shall commence serving as Acting Governor. Upon the Governor declaring that the period of disability has ended, the Acting Governor shall immediately cease to perform those duties and the Governor shall resume performance of the duties of the office of Governor. [2009 c.77 §1]
Oregon Legal Code