Conn. Agencies Regs. § 16-50j-15
Any person who proposes to be named or admitted as an intervenor in any proceeding pursuant to Section 4-177a of the Connecticut General Statutes may file a written petition to be so designated at least five days before the date of the hearing. The five day filing requirement may be waived upon a showing of good cause.
The petition shall state the name and address of the petitioner. It shall state facts that demonstrate the petitioner's participation shall furnish assistance to the Council in resolving the issues in the proceeding, is in the interests of justice and will not impair the orderly conduct of the proceedings pursuant to Section 4-177a of the Connecticut General Statutes. The petition shall provide a summary of the petitioner's contentions concerning the issues in the proceeding; the relief sought by the petitioner in the proceeding and the legal authority therefor; and the nature of the evidence, if any, that the petitioner intends to present in the event that the petition is granted.
The Council shall determine the proposed intervenor's participation in the proceeding, taking into account whether such participation will furnish assistance to the Council in resolving the issues of the case, is in the interests of justice, and will not impair the orderly conduct of the proceedings. Any person named or admitted as an intervenor may decline or withdraw such status at any time upon notifying the Council in writing of his or her intent not to participate as an intervenor.
Conn. Agencies Regs. § 16-50j-15