Do I need to reactivate my Sin Number??

[Banff2015]

Hey guys,
My original work permit expired in July. I then left Canada for a few weeks and have since returned now and activated a new permit via an lmia. My question is do I need to re activate the sin before I can return to work or what?
Cheers

 

[s23srinivas]

I noticed its been a couple of days that you asked the question.
I would suggest you to go to any Service Canada centre and get a clarification as SIN application does not cost you any fees and you get the answer from the horse's mouth.