A complaint alleging retaliation or unlawful discrimination, (such as discriminatory harassment, intimidation, or bullying), must be filed not later than six (6) months from the date occurred, or six (6) months from the date the complainant first obtained knowledge of the facts of the alleged unlawful discrimination. The time for filing may be extended for up to ninety (90) days by the Superintendent or designee for good cause upon written request by the complainant setting forth the reasons for the extension.