(a) The probation service or an authorized agency or disinterested person is authorized to, and at the request of the court, shall, interview such persons and obtain such data as will aid the court in determining the truth and accuracy of an adoption petition under article 7 of the Domestic Relations Law, including the allegations set forth in the schedule annexed to the petition pursuant to section 112(3) of that law and such other facts as are necessary to a determination of the petition.

(b) The adoptive parent or parents and other persons concerned with the proceeding shall be notified of the date, time and place of any interview by a disinterested person or authorized agency designated by the court in accordance with sections 112 and 116 of the Domestic Relations Law.

(c) The written report of the investigation conducted pursuant to subdivision (a) of this section shall be submitted to the court within 30 days from the date on which it was ordered, or earlier as the court may direct, unless, for good cause, the court shall grant an extension for a reasonable period of time not to exceed an additional 30 days.