29 CFR § 1601.19 - No cause determinations: Procedure and authority.
(a) Where the Commission completes its investigation of a charge and finds that there is not reasonable cause to believe that an unlawful employment practice has occurred or is occurring as to all issues addressed in the determination, the Commission shall issue a letter of determination to all parties to the charge indicating the finding. The Commission's letter of determination shall be the final determination of the Commission. The letter of determination shall inform the person claiming to be aggrieved or the person on whose behalf a charge was filed of the right to sue in Federal district court within 90 days of receipt of the letter of determination. The Commission hereby delegates authority to the Director of the Office of Field Programs, or upon delegation to the Director of Field Management Programs, and District Directors or upon delegation to Field Directors, Area Directors or Local Directors, except in those cases involving issues currently designated by the Commission for priority review, to issue no cause letters of determination.
(b) The Commission may on its own initiative reconsider a final determination of no reasonable cause and an issuing director may, on his or her own initiative reconsider his or her final determination of no reasonable cause. If the Commission or an issuing director decides to reconsider a final no cause determination, a notice of intent to reconsider shall promptly issue to all parties to the charge. If such notice of intent to reconsider is issued within 90 days of receipt of the final no cause determination, and the person claiming to be aggrieved or the person on whose behalf a charge was filed has not filed suit and did not request and receive a notice of right to sue pursuant to § 1601.28(a) (1) or (2), the notice of intent to reconsider shall vacate the letter of determination and shall revoke the charging party's right to bring suit within 90 days. If the 90 day suit period has expired, the charging party has filed suit, or the charging party had requested a notice of right to sue pursuant to § 1601.28(a) (1) or (2), the notice of intent to reconsider shall vacate the letter of determination, but shall not revoke the charging party's right to sue in 90 days. After reconsideration, the Commission or issuing director shall issue a new determination. In those circumstances where the charging party's right to bring suit in 90 days was revoked, the determination shall include notice that a new 90 day suit period shall begin upon the charging party's receipt of the determination. Where a member of the Commission has filed a Commissioner charge, he or she shall abstain from making a determination in that case.