CA Prob Code Section 202

If proceedings for the administration of the decedent’s estate are pending, proceedings under this chapter may be combined with the administration proceedings in the following manner:

(a)

The petition shall be filed in the administration proceedings by the person affected or by the personal representative.

(b)

The petition shall be filed at any time before the filing of a petition for final distribution. The petition may be included in a petition for probate of the will of the decedent or for letters.

(c)

The petition shall be filed without any additional fee.