Lifejackets

Can anyone tell me what the law is for lifejackets in a canoe going down the Saco River in Maine, near Swan Falls? I have a 15 year old lifejacket for my 48 year old body. Is this good enough? Do I have to wear it while canoing?

Required Wear
http://www.maine.gov/ifw/rv/boatlaws.htm#pfds