The company itself can do that. It's not all that common, but I've seen it done. They say in a filing that they provisionally approved it, but haven't yet decided whether to go ahead, or when to go ahead.
But they can't get an advance approval from FINRA. Should they decide on a reverse split for real, they'll still have to submit a corporate action request, and wait for the okay from FINRA. It's FINRA that sets the date on which it will become effective.
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