Oregon Revised Statutes Domestic Relations § 106.150

(1) In the solemnization of a marriage no particular form is required except that the parties thereto shall assent or declare in the presence of the clergyperson, county clerk or judicial officer solemnizing the marriage and in the presence of at least two witnesses, that they take each other to be spouses in a marriage.

(2) All marriages, to which there are no legal impediments, solemnized before or in any religious organization or congregation according to the established ritual or form commonly practiced therein, are valid. In such case, the person presiding or officiating in the religious organization or congregation shall deliver to the county clerk who issued the marriage license the application, license and record of marriage in accordance with ORS 106.170.