§ 624. Evidence. Only competent, material and relevant evidence may be
admitted in a fact-finding hearing; only material and relevant evidence
may be admitted in a dispositional hearing. Evidence of parental contact
or of failure to maintain contact with a child subsequent to the date of
the filing of a petition under this part shall be inadmissible in the
fact-finding hearing. Such evidence may be admitted in the dispositional
hearing but shall not, of itself, be sufficient as a matter of law to
preclude or require an order committing the guardianship and custody of
the child.