California Code, Probate Code - PROB § 2595

(a) The grant of a power or powers pursuant to this article does not affect the right of the guardian or conservator to petition the court as provided in Section 2403 or to petition the court under other provisions of this code, as to a particular transaction or matter, in the same manner as if the power or powers had not been granted pursuant to this article.

(b) Where authority exists under other provisions of law, either general or specific, for the guardian or conservator to do any act or to enter into any transaction described in Section 2591, the guardian or conservator may proceed under such other provisions of law and is not required to obtain authority under this article.