Okla. Stat. tit. 62 § 49
On or before November 1 of each year, the Office of Management and Enterprise Services shall develop and publish a multi-year trend analysis of the state's budget outlook which includes the current fiscal year, the ensuing fiscal year and the following two (2) fiscal years. The trend analysis shall include projections of revenues and expenditures reflecting the best available information concerning economic activity, population change, policy developments and other factors affecting the state budget. The analysis shall be provided to the President Pro Tempore of the Senate, members of the Senate Appropriations and Finance Committees, the Speaker of the House of Representatives and members of the House Appropriations and Budget Committee.
Okla. Stat. tit. 62, § 49