Any stock which may be made redeemable under this section may be redeemed for cash, property or rights, including securities of the same or another corporation, at such time or times, price or prices, or rate or rates, and with such adjustments, as shall be stated in the certificate of incorporation or in the resolution or resolutions providing for the issue of such stock adopted by the board of directors pursuant to subsection (a) of this section.
shall be executed, acknowledged and filed and shall become effective, in accordance with § 103 of this title. When any certificate filed under this subsection becomes effective, it shall have the effect of amending the certificate of incorporation; except that neither the filing of such certificate nor the filing of a restated certificate of incorporation pursuant to § 245 of this title shall prohibit the board of directors from subsequently adopting such resolutions as authorized by this subsection.
8 Del. C. § 151