Deficiency notice
If a company is in violation of the continued listing standards for a period of 30 consecutive days, the NASDAQ sends a "deficiency notice." The most common reasons for a deficiency notice are a share price that falls below $1.00 or a market cap that falls below the stated minimum (as low as $5 million if other requirements are satisfied).
Once a deficiency notice has been sent, the company has 90 days to comply with the continued listing standards, or 180 days if the violation was for a sub-$1.00 share price. In order to be compliant, the company's share price or market cap must rise above the minimum for at least 10 consecutive days in the 90-day (or 180-day) period.
Of course, becoming compliant for violating some of the other requirements is pretty straightforward. For example, if a company receives a deficiency notice for failing to pay its listing fee, the fix is obvious -- pay the fee.
