The California Designation of Pooled Unit for Oil and Gas refers to a legal process in the state of California that allows multiple oil and gas leases or tracts to be consolidated into a single unit for the purpose of maximizing resource recovery and optimizing production efficiency. This designation is important in the oil and gas industry as it helps streamline operations and promotes collaboration among leaseholders within a defined geographical area. One type of California Designation of Pooled Unit for Oil and Gas is the voluntary pooling agreement. This type of pooling occurs when leaseholders voluntarily agree to combine their individual leases or tracts into a single unit. By consolidating their resources, leaseholders can reduce costs, increase production rates, and efficiently extract oil and gas from the pooled unit. Another type of California Designation of Pooled Unit for Oil and Gas is the compulsory pooling order. In some cases, when individual leaseholders are unable or unwilling to reach a voluntary agreement, the California Department of Conservation's Division of Oil, Gas, and Geothermal Resources (Dog) has the authority to issue a compulsory pooling order. This order compels reluctant leaseholders to participate in the pooled unit and share the benefits of resource extraction. Keywords: California, Designation of Pooled Unit, oil and gas, leases, tracts, consolidation, resource recovery, production efficiency, streamline operations, collaboration, voluntary pooling agreement, compulsory pooling order, leaseholders, costs, production rates, resource extraction, California Department of Conservation, Division of Oil, Gas, and Geothermal Resources (Dog).