CA Gov't Code Section 57502

The territory of a consolidated district shall be liable for payment of principal, interest, and any other amounts which become due on account of any outstanding or then authorized but thereafter issued bonds, including revenue bonds, or other contracts or obligations of all predecessor districts, and are subject to the levying or fixing and collection of any of the following which may be necessary to provide for payment:

(a)

Taxes or assessments.

(b)

Service charges, rentals, or rates.

(c)

Both taxes or assessments and service charges, rentals, or rates. However, only the territory within an improvement district shall be liable for any payment required on account of any bonds, including revenue bonds, or other contracts previously authorized or issued by, or on behalf of, the improvement district.