Senate Joint Resolution No. 121, introduced by Senator Looney and Representative Ritter M., outlines the rules for the September 26 Special Session of 2023. The resolution stipulates that the joint rules from the 2023 regular session will apply to the special session, with specific amendments, alterations, or repeals as detailed in the resolution. Notably, only bills and substantive resolutions specified in the Governor's Proclamation dated September 22, 2023, will be received. The resolution also mandates that the Legislative Commissioners' Office (LCO) will prepare all bills and resolutions, which must be printed without interlineation or erasure, and amendments to existing statutes must clearly indicate changes with brackets, overstriking, capitalization, or underscoring.

The resolution further specifies procedural changes, including the immediate transmission of bills or joint resolutions upon passage in the first house, the requirement of a fiscal note for any bill or resolution affecting state or municipal revenue or expenditure, and the immediate actionability of each bill or resolution. It also requires a roll call vote for each bill and substantive resolution. Several rules from the regular session are explicitly stricken out and replaced with new provisions tailored to the special session, such as the handling of emergency certified bills and resolutions, the readings of bills and resolutions, and the transmittal between houses. Rules 18, 19, 20, 27, 31, 32, and 34 are entirely stricken out without replacement.