(1) if submitted by an organization, state the nature and purpose of the organization, number of members, organizational structure, history of formation and legal nature, and include a copy of any charter, certificate of incorporation, bylaws, constitution or the like;

(2) demonstrate capacity to participate in administrative proceedings and to supply information or expertise relative to matters likely to be considered at the hearing;

(3) state whether the petitioner has participated in any previous legal or administrative proceedings similar to those conducted by the agency;

(4) state the petitioner's relationship to the matters involved, the nature of the evidence or argument he intends to present, and any other matter the petitioner believes relevant to granting the petition;

(5) demonstrate that the petitioner has a material social, economic or environmental interest which is likely to be affected by the agency decision concerning the project.

(1) Any decision of the executive director or the hearing officer to grant or deny intervention may, within five days of receipt, be appealed to the agency, which will decide the appeal at its next regular meeting. Other parties may submit briefs in support of or in opposition to the decision.

(2) Notice of such appeal and a copy of all materials submitted in support thereof shall be given the executive director or hearing officer and all parties to the hearing. Upon receipt of notice of such an appeal, the hearing officer shall decide whether to adjourn the hearing, or to make such other order protecting the interests of the parties and the petitioner as justice requires, including an order that witnesses be recalled should the decision be reversed.