(a) General rule.--Unless the court issues a temporary emergency order pursuant to section 5424 (relating to temporary emergency jurisdiction), 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 section 5445 (relating to registration of child custody determination) and that:

(i) the issuing court did not have jurisdiction under Subchapter B (relating to jurisdiction);

(ii) 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 B; or

(iii) the respondent was entitled to notice, but notice was not given in accordance with the standards of section 5408 (relating to notice to persons outside Commonwealth), 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 section 5445 but has been vacated, stayed or modified by a court of a state having jurisdiction to do so under Subchapter B.

(b) Costs, fees and expenses.--The court shall award the costs, fees and expenses authorized under section 5452 (relating to costs, fees and expenses) 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) Refusal to testify.--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) Spousal privilege unavailable.--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.