(a) Unless the court issues a temporary emergency order pursuant to § 1923 of this title, 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 that:
(1) The child custody determination has not been registered and confirmed under § 1934 of this title and that:
a. The issuing court did not have jurisdiction under subchapter II of this chapter;
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 subchapter II of this chapter; or
c. The respondent was entitled to notice, but notice was not given in accordance with the standards of § 1908 of this title, in the proceedings before the court that issued the order for which enforcement is sought; or
(2) The child custody determination for which enforcement is sought was registered and confirmed under § 1934 of this title but has been vacated, stayed or modified by a court of a state having jurisdiction to do so under subchapter II of this chapter.
(b) The court shall award the fees, costs and expenses authorized under § 1941 of this title and may grant additional relief 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 husband and wife or parent and child may not be invoked in a proceeding under this subchapter.