Each of the following shall be void:
(a) any purported termination of or suspension from employment of an adopting parent while absent from work -
(i) on adoptive leave or additional adoptive leave, or
(ii) attending pre-adoption classes or meetings in accordance with section 11A;
(b) any notice of termination of the employment of an adopting parent given during the parent's absence from work -
(i) on adoptive leave or additional adoptive leave, or
(ii) while attending pre-adoption classes or meetings in accordance with that section,
and expiring after the absence.