Section 260.5b-3 - Number of copies-Filing-Signatures(a) Three copies of every application pursuant to rule 5b-1 (§ 260.5b-1 of this chapter) and of every amendment thereto shall be filed with the Commission at its principal office by the issuer upon the indenture securities. Such application shall be filed no later than the second business day following the initial date of public offering or sales after effectiveness of the registration statement with respect to such securities, or transmitted by a means reasonably calculated to result in filing with the Commission by that date.(b) One copy shall be manually signed by the applicant's duly authorized officer (or individual customarily performing similar functions with respect to any organization, whether incorporated or unincorporated), or by the individual trustee, as applicable.56 FR 22320, May 15, 1991