A company can request an extension for late filing.
5 calendar days on a quarterly report 15 calendar days on an annual report
IMO, the company won't get to that bridge, so we don't need to worry about crossing it.
A company can file a report late as DOLV did earlier this year. We saw DOLV's Stop Sign removed earlier this year a couple days after they posted a report. The quarterly report was posted on July 11 and Stop sign was removed from OTCmarkets on July 13.
Eventually a company can get a yield sign or stop sign if they do not disclose information as per Pink Basic Disclosure Guidelines. The signs are just informational for investors, telling the level of the company's disclosure.