The full draft regulatory text is available here: Topics of Proposed Regulatory Changes in Omnibus 2026. The regulation carves sowing, planting, irrigation, and mechanical soil preparation out of “human activity,” but treats processes such as adding chemicals to irrigation water as human activity. But OEHHA expressly invited broader proposals, and the workshop discussion tracked the fault lines that have surrounded this exemption for decades. The regulation carves sowing, planting, irrigation, and mechanical soil preparation out of “human activity,” but treats processes such as adding chemicals to irrigation water as human activity. But OEHHA expressly invited broader proposals, and the workshop discussion tracked the fault lines that have surrounded this exemption for decades.