Section 205.81 - What to file(a) A person filing under this subpart shall file a "Request for Interpretation," which should be clearly labeled as such both on the request and on the outside of the envelope in which the request is transmitted, and shall be in writing and signed by the person filing the request. The person filing the request shall comply with the general filing requirements stated in § 205.9 in addition to the requirements stated in this subpart.(b) If the person filing the request wishes to claim confidential treatment for any information contained in the request or other documents submitted under this subpart, the procedures set out in § 205.9(f) shall apply.