The people of the State of Oregon have the right to veto any Act of the Legislature, unless that Act is declared to be an emergency, as described in Article IV, Section 1 of the Oregon Constitution:
(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.
Legislative emergencies are defined in Article IV of the Oregon Constitution
Article IV, Section 28. When Act takes effect. No act shall take effect, until ninety days from the end of the session at which the same shall have been passed, except in case of emergency; which emergency shall be declared in the preamble, or in the body of the law.
Legislation concerning taxes cannot be an emergency:
Article IX, Section 1a. ...The Legislative Assembly shall not declare an emergency in any act regulating taxation or exemption.
This is the text of 2022 IP 1, the No Fake Emergencies Act:
The People of Oregon amend Article IV, Section 28 of the Oregon Constitution as follows:
(1) No act shall take effect, until ninety days from the end of the session at which the same shall have passed, except in case of emergency; which emergency shall be declared in the preamble, or in the body of the law.
(2) (a) Two-thirds of the members of each House shall be necessary to pass a bill declaring an emergency.
(b) Paragraph (a) of this subsection does not apply to:
(A) Bills passed in direct response to a "catastrophic disaster" declared by the Governor within an emergency legislative session operating under Article X-A of this Constitution.
(B) Bills limited to the biennial appropriation of funding for current and ordinary expenses of state government or Oregon's K-12 public school system in a regular legislative session under Article IV, Section 10(1)(a). "Current and ordinary expenses" shall not include:
(I) Expenditures for activities or programs of agencies, institutions, organizations that were not funded in the prior biennial budget;
(II) Biennial budget increases to agencies, institutions or organizations in excess of 12% above the prior biennium; or
(III) Any bills appropriating funds for capital expenditure projects that include an authorization for debt financing that will not be fully repaid in two years.
(C) Bills limited to reducing appropriations in order to balance the state budget during a revenue shortfall.