Oregon Revised Statutes Property Rights and Transactions § 105.885

(1) “Instrument” means a deed, contract, covenant, condition, permit or order that creates an access right to sunlight.

(2) “Solar energy easement” means any easement, covenant or conditions designed to insure the passage of incident solar radiation, light, air or heat across the real property of another.

(3) “Solar envelope” means a three-dimensional space over a lot representing height restrictions for structures and vegetation on the lot designed to protect access to sunlight for neighboring lots.

(4) “Sun chart” means a representation showing the plotted position of the sun. The chart shall display the path of the sun during each hour of the day and each month of the year at the nearest degree of latitude to the property.