Any person who is not a member of the commission and wishes to appear before the commission at a regular or special meeting shall advise the presiding co-chairperson or designee before the meeting convenes, using a witness slip provided for that purpose. The witness slip shall indicate the person's name and address, group represented and the subject upon which the person desires to speak. The request may be granted, refused or otherwise acted upon at the discretion of the presiding co-chairperson or designee. No person shall speak more than once on the same subject, unless granted permission by the presiding co-chairperson or designee. No presentation under this rule shall be more than ten minutes unless permission is granted by the presiding co-chairperson or designee.