Oregon Constitution Art. IV § 1

(2)(a) The people reserve to themselves the initiative power, which is to propose laws and amendments to the Constitution and enact or reject them at an election independently of the Legislative Assembly.

(b) An initiative law may be proposed only by a petition signed by a number of qualified voters equal to six percent of the total number of votes cast for all candidates for Governor at the election at which a Governor was elected for a term of four years next preceding the filing of the petition.

(c) An initiative amendment to the Constitution may be proposed only by a petition signed by a number of qualified voters equal to eight percent of the total number of votes cast for all candidates for Governor at the election at which a Governor was elected for a term of four years next preceding the filing of the petition.

(d) An initiative petition shall include the full text of the proposed law or amendment to the Constitution. A proposed law or amendment to the Constitution shall embrace one subject only and matters properly connected therewith.

(e) An initiative petition shall be filed not less than four months before the election at which the proposed law or amendment to the Constitution is to be voted upon.

(3)(a) The people reserve to themselves the referendum power, which is to approve or reject at an election any Act, or part thereof, of the Legislative Assembly that does not become effective earlier than 90 days after the end of the session at which the Act is passed.

(b) A referendum on an Act or part thereof may be ordered by a petition signed by a number of qualified voters equal to four percent of the total number of votes cast for all candidates for Governor at the election at which a Governor was elected for a term of four years next preceding the filing of the petition. A referendum petition shall be filed not more than 90 days after the end of the session at which the Act is passed.

(c) A referendum on an Act may be ordered by the Legislative Assembly by law. Notwithstanding section 15b, Article V of this Constitution, bills ordering a referendum and bills on which a referendum is ordered are not subject to veto by the Governor.

(4)(a) Petitions or orders for the initiative or referendum shall be filed with the Secretary of State. The Legislative Assembly shall provide by law for the manner in which the Secretary of State shall determine whether a petition contains the required number of signatures of qualified voters. The Secretary of State shall complete the verification process within the 30-day period after the last day on which the petition may be filed as provided in paragraph (e) of subsection (2) or paragraph (b) of subsection (3) of this section.

(b) Initiative and referendum measures shall be submitted to the people as provided in this section and by law not inconsistent therewith.

(c) All elections on initiative and referendum measures shall be held at the regular general elections, unless otherwise ordered by the Legislative Assembly.

(d) Notwithstanding section 1, Article XVII of this Constitution, an initiative or referendum measure becomes effective 30 days after the day on which it is enacted or approved by a majority of the votes cast thereon. A referendum ordered by petition on a part of an Act does not delay the remainder of the Act from becoming effective.