This excerpt taken from the PCG 10-Q filed May 4, 2005.
SECTION 3.09. Cancellation by Bond Registrar.
All Bonds surrendered for payment, redemption, registration of transfer or exchange shall, if surrendered to any Person other than the Bond Registrar, be delivered to the Bond Registrar and, if not theretofore canceled, shall be promptly canceled by the Bond Registrar. The Company may at any time deliver to the Bond Registrar for cancellation any Bonds previously authenticated and delivered hereunder which the Company may have acquired in any manner whatsoever or which the Company shall not have issued and sold (or pledged), and all Bonds so delivered shall be promptly canceled by the Bond Registrar. No Bonds shall be authenticated in lieu of or in exchange for any Bonds canceled as provided in this Section, except as expressly permitted by this Indenture. All canceled Bonds held by the Bond Registrar shall be disposed of in accordance with the Bond Registrar’s then customary practice for disposing of securities, unless otherwise directed by a Company Order.