How is "as promptly as possible" defined with respect to Intraday Margin Deficit (IMD)?

Based on FINRA guidance, "as promptly as possible" with respect to an Intraday Margin Deficit (IMD) is defined as meeting the IMD call within three business days of when the IMD call was originally issued.

On the fourth instance of not satisfying an IMD within three business days over a 12-month rolling period, IBKR will consider the client to be making a practice of failing to satisfy an IMD "as promptly as possible."

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What trading restrictions are imposed on my account for 90 calendar days after failing to satisfy an Intraday Margin Deficits (IMD)?
What happens if I do not satisfy an Intraday Margin Deficit (IMD)?
What is considered making a practice of failing to satisfy Intraday Margin Deficits (IMD) "as promptly as possible"?
Is my account still subject to the IMD requirements if the deficit was caused by fraudulent activity?