Calculation of Principal Amount of Notes The aggregate principal amount of the Notes, at any date of determination, shall be the principal amount of the Notes at such date of determination. With respect to any matter requiring consent, waiver, approval or other action of the holders of a specified percentage of the principal amount of all the Notes, such percentage shall be calculated, on the relevant date of determination, by dividing (a) the principal amount, as of such date of determination, of Notes, the holders of which have so consented, by (b) the aggregate principal amount, as of such date of determination, of the Notes then outstanding, in each case, as determined in accordance with the preceding sentence, and Section 13.06 of this Indenture. Any calculation of the Applicable Premium made pursuant to this Section 2.13 shall be made by the Company and delivered to the Trustee pursuant to an Officers’ Certificate.