For an extensive history of efforts to enact an anti-SLAPP statute in Oregon, see A Legislative History of the Oregon Experience in Limiting SLAPPS (Feb. 2001).
Two competing anti-SLAPP bills were introduced in the 1999 session of the Legislative Assembly. Senate Bill 330 (The Citizen Participation In Government Act of 1999) was introduced at the request of Oregon Communities for a Voice in Annexations (OCVA), the Department of Land Conservation and Development, a number of elected officials, 1000 Friends of Oregon, the League of Women Voters, and other citizen advocacy groups around Oregon.
Later, House Bill 2805 was introduced as a stronger anti-SLAPP bill, and many of the original supporters of SB 330 shifted support to HB 2805. HB 2805 passed the House 49-9 (see Anti-SLAPP Measure Easily Clears Oregon House) but failed in the state senate (see Anti-SLAPP Bill Dies in the Oregon Senate). The bill was amended in both the House and Senate (see HB 2805 as amended). HB 2805 was authored by Rep. Kurt Schrader.
In 2001, House Bill 2460 was filed at the request of Representatives Kurt Shrader and Lane Shetterly and had its first reading Jan. 12, 2001. The bill was supported by the Oregon chapter of the American Planning Association. It was signed into law by the governor on June 26, 2001.
In 2005, the Oregon State Legislature changed the numbering of the anti-SLAPP statutes in the Oregon Revised Statutes from §§ 30.142 - 30.146 to §§ 31.150 - 31.155. No substantive changes were made.