17 CFR § 249.26
Form 26, for notification of the admission to trading of a substituted or additional class of security under Rule 12a-5 (§240.12a-5 of this chapter)
April 15, 2021
This form shall be used by a registered national securities exchange for notification of the admission to trading of a substituted or additional class of security under Rule 12a-5.
[33 FR 18995, Dec. 20, 1968]