(c) If the commissioner determines after investigation that no probable cause exists to credit the allegations of the unfair discriminatory practice, the commissioner shall, within ten days of the determination, serve upon the charging party and respondent written notice of the determination. Within 30 days after receipt of notice, the charging party may request in writing, on forms prepared by the department, that the commissioner reconsider the determination. The request shall contain a brief statement of the reasons for and new evidence in support of the request for reconsideration. At the time of submission of the request to the commissioner, the charging party shall deliver or mail to the respondent a copy of the request for reconsideration. The commissioner shall reaffirm, reverse, or vacate and remand for further consideration the determination of no probable cause within 20 days after receipt of the request for reconsideration, and shall within ten days notify in writing the charging party and respondent of the decision to reaffirm, reverse, or vacate and remand for further consideration.