Here is an excerpt from a legal update by a Wall S
Post# of 30027
"The reverse merger company must have maintained a minimum closing stock price of, in the case of NYSE and NASDAQ, at least $4 per share “for a sustained period of time, but in no event for less than 30 of the most recent 60 trading days” prior to filing of the listing application and the date the relevant exchange approves the listing."
No less than 30 out of 60. Once you have hit the 30, you meet the requirement. You don't have to wait 30 more days. The 60 day period is only relevant because it is when you lose it.
After tomorrow (assuming we close below $4), AMBS will have only traded above $4 for 29 out of the last 60 days!