(1) When the Department determines a report is unsupported, the Department shall issue written notice of the response to the following interested persons, as applicable at their current or last address or email:

1. (a) The parent(s) or caregiver(s):

   1. 1. If both parents, have custody of the child(ren), notice will be sent to both parents.
   2. 2. If only one parent has custody of the child(ren) by court-order, notice will be sent only to the parent(s) with court-ordered custody of the child(ren).
2. (b) If the source of the report was a mandated reporter, the mandated reporter receives a copy of the notice sent to the parent(s) or caregiver(s).
3. (c) The director or owner of a facility involved in a report containing an allegation of institutional abuse or neglect, which occurred at a facility owned, operated, or funded, in whole or in part, by any department or office listed in 110 CMR 4.30(3), or at a facility operated by a person or entity subject to licensure or approval by any department or office listed in 110 CMR 4.30(3).
4. (d) Other state agencies who received notice of the report during the screening process or 51B response.