Fam. Code, § 3450

(a) Unless the court issues a temporary emergency order pursuant to Section 3424, upon a finding that a petitioner is entitled to immediate physical custody of the child, the court shall order that the petitioner may take immediate physical custody of the child unless the respondent establishes either of the following:

(1) That the child custody determination has not been registered and confirmed under Section 3445 and one of the following is true:

(A) The issuing court did not have jurisdiction under Chapter 2 (commencing with Section 3421).

(B) The child custody determination for which enforcement is sought has been vacated, stayed, or modified by a court of a state having jurisdiction to do so under Chapter 2 (commencing with Section 3421).

(C) The respondent was entitled to notice, but notice was not given in accordance with the standards of Section 3408, in the proceedings before the court that issued the order for which enforcement is sought.

(2) That the child custody determination for which enforcement is sought was registered and confirmed under Section 3445 but has been vacated, stayed, or modified by a court of a state having jurisdiction to do so under Chapter 2 (commencing with Section 3421).

(b) The court shall award the fees, costs, and expenses authorized under Section 3452 and may grant additional relief, including a request for the assistance of law enforcement officials, and set a further hearing to determine whether additional relief is appropriate.

(c) If a party called to testify refuses to answer on the ground that the testimony may be self-incriminating, the court may draw an adverse inference from the refusal.

(d) A privilege against disclosure of communications between spouses and a defense of immunity based on the relationship of spouses or parent and child may not be invoked in a proceeding under this chapter.