FINRA 6490 RULE gives the time frame specified in SEA Rule 10b-17 (10 days prior to the record date involved):
Effective September 27, 2010, new FINRA Rule 6490 (Processing of Company-Related Actions) codifies the requirements in SEA Rule 10b-17 for issuers of a class of publicly trading securities to provide timely notice to FINRA of certain corporate actions (e.g., dividend or other distribution of cash or securities, stock split or reverse split, rights or subscription offering).
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