Nope, there is no official grace period with Pink OTC. You could call them and ask if they have some unofficial one.
Quarterly Reporting Obligations
In order to be considered as having adequate current information publicly available, issuers must publish Quarterly Updates to their disclosure statements through the OTC Disclosure and News Service, no later than 45 days after the end of each fiscal quarter. Quarterly Updates should contain responses to the following items, and should follow the format below.