When a county district ceases to function and exercise its powers because it is included entirely within a regional district created pursuant to Chapter 5 (commencing with Section 40300), the regional district shall succeed to all the funds, property, and obligations of the county district.

Where the county district is included within two or more such regional districts, the funds, property, and obligations of the county district shall be apportioned to the regional districts as agreed upon by the regional districts and county district.