When will Intraday Margin Deficit (IMD) calls be issued?

An Intraday Margin Deficit (IMD) call is issued on the business day following the day the deficit occurred.

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Can a deposit on the same day as the Intraday Margin Deficit (IMD) reduce or preempt the IMD call?
Can an Intraday Margin Deficit (IMD) restriction be lifted?
If I deposit funds to meet an Intraday Margin Deficit (IMD), how long are my funds required to be in the account?
What happens if my account incurs an IMD over the weekend or on a US trading holiday?