The indenture to be qualified -
Notwithstanding any other provision of the indenture to be qualified, the right of any holder of any indenture security to receive payment of the principal of and interest on such indenture security, on or after the respective due dates expressed in such indenture security, or to institute suit for the enforcement of any such payment on or after such respective dates, shall not be impaired or affected without the consent of such holder, except as to a postponement of an interest payment consented to as provided in paragraph (2) of subsection (a) of this section, and except that such indenture may contain provisions limiting or denying the right of any such holder to institute any such suit, if and to the extent that the institution or prosecution thereof or the entry of judgment therein would, under applicable law, result in the surrender, impairment, waiver, or loss of the lien of such indenture upon any property subject to such lien.
The obligor upon any indenture qualified under this subchapter may set a record date for purposes of determining the identity of indenture security holders entitled to vote or consent to any action by vote or consent authorized or permitted by subsection (a) of this section. Unless the indenture provides otherwise, such record date shall be the later of 30 days prior to the first solicitation of such consent or the date of the most recent list of holders furnished to the trustee pursuant to section 77lll of this title prior to such solicitation.