Conn. Agencies Regs. § 31-1-14
In addition to the notice required to be given by the petitioner in subsection (d) of this section, the agency shall, within thirty days after the receipt of such petition provide written notice of the filing of the petition (1) to all persons required by any law to receive notice, (2) to all persons who have requested notice of the filing of such petitions on the subject matter of the petition, and (3) to all persons who have requested notice of the filing of any such petitions with the agency. The notice required by this section shall not be required where the agency has rejected the filing of a petition as inappropriate or incomplete in accordance with Section 31-1-12, or subsection (b) or (c) of Section 31-1-13 of these regulations.
Conn. Agencies Regs. § 31-1-14