Streets and Highways Code § 26242

If at the time of the election to dissolve the district there is outstanding any bonded indebtedness of the district, the vote to dissolve shall dissolve the district for all purposes except the levy and collection of taxes for the payment of that outstanding indebtedness.

From the time of dissolution until the bonded indebtedness together with the interest thereon is fully paid, the board of supervisors of the county shall constitute ex officio the boulevard commission of the district, and shall levy such taxes and perform such other acts as may be necessary to raise money for the payment of the outstanding indebtedness of the district.