(

a) The department or delegated county adoption agency shall interview the petitioners within working days, excluding legal holidays, after the department or delegated county adoption agency receives percent of the investigation fee together with a stamped file copy of the adoption petition. (

b) The department or delegated county adoption agency shall interview all persons from whom consent is required and whose addresses are known. The interview with the placing parent or parents shall include, but not be limited to, discussion of any concerns or problems that the parent has with the placement and, if the placing parent was not interviewed as provided in

Section 8801.7, the content required in that interview. At the interview, the agency shall give the parent an opportunity to sign either a statement revoking the consent, or a waiver of the right to revoke consent, as provided in

Section 8814.5, unless the parent has already signed a waiver or the time period allowed to revoke consent has expired. (

c) In order to facilitate the interview described in this section, within five business days of filing the petition, the petitioners shall provide the department or delegated county adoption agency a stamped file copy of the petition together with percent of the fee, a copy of any valid preplacement evaluation or any valid private agency adoption home study, as described in paragraph (2) of subdivision (

a) of

Section 8810, and the names, addresses, and telephone numbers of all parties to be interviewed, if known.