Is new law retroactive has anyone tried????

I landed in Dec2000 and stayed in Canada for total of not more than 20 days. I have bank account, Health card and driver's license. Now I understand I have till dec2003 to enter back Canada to live there permanently.
Has someone who is in my situation entered recently(even though they were out for more than 183 days) and were allowed entry under new law..
Is is retroactive for real????.
Please respond...I would appreciate the help.
 
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