OASIS Public Review Question

Hi Mary, a process question for you.  Is it possible to send a PRD for a 
60-day review, and then based on the volume of comments, decide to extend 
the review for a further 30 days?  Or are we required to prescient and 
request a 90-day comment period initially?  In other words, is it possible 
to extend a public review once it has been issued?

-Rob