Oregon Constitution Art. IV § 20

Every Act shall embrace but one subject, and matters properly connected therewith, which subject shall be expressed in the title. But if any subject shall be embraced in an Act which shall not be expressed in the title, such Act shall be void only as to so much thereof as shall not be expressed in the title.

This section shall not be construed to prevent the inclusion in an amendatory Act, under a proper title, of matters otherwise germane to the same general subject, although the title or titles of the original Act or Acts may not have been sufficiently broad to have permitted such matter to have been so included in such original Act or Acts, or any of them.