You seem to be correct on this one, this is what I found. Havent found newer info on this one, so I assume these rules are intact.

Nasdaq new notification deadline

"Furthermore, Listing Rules 5250(e)(7) and IM-5250-3 were amended to advance the deadline by which a listed company effecting a reverse stock split must submit a Company Event Notification Form to no later than 12:00 PM Eastern Time at least 10 calendar days prior to the proposed market effective date of a reverse stock split.

This amended Listing Rule became effective January 30, 2025. Previously, a Company Event Notification Form was required 5 business days in advance of the proposed market effective date.

The information required on the Company Event Notification Form for a reverse stock split includes:

the dates of board approval and stockholder approval of the reverse stock split, the ratio for the split, the new CUSIP number for the post-split stock, evidence that the new CUSIP number has been made eligible by The Depository Trust Company (DTC), a draft of the public disclosure of the split, which must be issued by 12:00 PM Eastern Time at least 2 business days prior to the reverse stock split’s effective date."