California Code, Probate Code - PROB § 2300

(a) Take an oath to perform the duties of the office according to law.  The oath obligates the guardian or conservator to comply with the law of this state, as well as other applicable law, at all times, in any location within or without the state.  If the conservator petitions for transfer of the conservatorship to another state pursuant to Section 2001, the conservator shall continue to comply with the law of this state until the court issues a final order confirming the transfer and terminating the conservatorship pursuant to Section 2001.  The oath shall be attached to or endorsed upon the letters.

(b) File the required bond if a bond is required.