Validity of 35 contact hours / PDU
I attended PMP training in May 2014 and collected the 35 contact hours certificate (the training was based on PMBOK V5). But I have not applied for PMP exam. I am planning to write the PMP in June 2016. Is my 35 contact hours that I collected 2 years back still valid or should I need to reappear and get the 35 contact hours. Is there any PMI rule stating that the training should be completed before X period from the date of exam?
Also, can I show my person learning as 35 contact hours?