+1, please take the time to check it out. I was so excited that i registered even without knowing the 14 day limit . Fortunately, I was able to get all documents in time.Everything you need is explained in detail in the OINP application guide:
http://www.ontarioimmigration.ca/prodconsum/groups/csc/@oipp/documents/document/oi_en_hcps_010517.pdf