This excerpt taken from the CHTR 10-Q filed May 12, 2008.
Notation on or Exchange of Notes.
The Trustee may place an appropriate notation about an amendment, supplement or waiver on any Note thereafter authenticated. The Issuers in exchange for all Notes may issue and the
Trustee shall, upon receipt of an Authentication Order, authenticate new Notes that reflect the amendment, supplement or waiver.
Failure to make the appropriate notation or issue a new Note shall not affect the validity and effect of such amendment, supplement or waiver.