Section 1605.3 - Compulsory processes and the service thereof(a) In addition to or in lieu of authorizing the issuance of a notice, the Commission may elect to use any of the following means to initiate investigations, inspections, or inquiries to obtain information for the purposes set forth in § 1605.1(a) : (3) Investigational Hearings;(5) Written Interrogatories; and(6) General or special Orders.(b) Service of notice in connection with any of the compulsory processes enumerated in § 1605.3(a) shall be effected as follows:(1) By personal service upon the person, or agent-in-charge of the sole proprietorship, partnership, or corporation being investigated, inspected, or inquired of; or(2) By mail (registered or certified) or delivery to the last known residence or business address of anyone being investigated, inspected, or inquired of.(c) The date of service of any form of compulsory process shall be the date on which the document is mailed, or delivered in person, whichever is applicable. Whenever a party is required or permitted to do an act within a prescribed period after service of a document and the document is served by mail, three (3) days shall be added to the prescribed period.(d) These rules shall be referred to in any form of compulsory process served upon a person, sole proprietorship, partnership, or corporation.(e) Anyone submitting information in response to any of the compulsory processes referred to in § 1605.4(a) hereof should state whether any of the information submitted is believed to contain or relate to a trade secret or other matter which should be considered by the Commission to be confidential in accordance with section 4(c) of the Flammable Fabrics Act (15 U.S.C. 1193(c) ) and whether any of the information is believed to be entitled to exemption from disclosure by the Commission under the provisions of the Freedom of Information Act (15 U.S.C. 552 ) or section 6(f) of the Federal Trade Commission Act (15 U.S.C. 46(f) ) . Any statement asserting this claim of confidentiality must be in writing, and any request for exemption of the information from disclosure must be made in accordance with the Commission's Freedom of Information Act regulations, 16 CFR part 1015, 42 FR 10490, February 22, 1977 or as amended.