Who must approve supplemental pesticide regulations adopted by County Agricultural Commissioners?

The approval of supplemental pesticide regulations adopted by County Agricultural Commissioners must come from the Department of Pesticide Regulation. This requirement is critical as it ensures that local regulations are consistent with state standards and that they align with the overall regulatory framework aimed at protecting public health and the environment.

The role of the Department of Pesticide Regulation is to oversee the implementation of pesticide laws in California, making it the appropriate authority to review and approve any additional regulations that local agricultural commissioners might propose. This process helps maintain a balance between local agricultural practices and statewide environmental protection initiatives.

The other options, while important entities in the governance system, do not have the same directly defined role in the approval of pesticide regulations. The Office of the Governor, the County Board of Supervisors, and the California State Legislature serve different functions in the legislative and administrative processes, but they are not specifically responsible for the approval of these specialized supplemental regulations. Therefore, the Department of Pesticide Regulation is the proper authority in this context.