Is this about extending your visa?? Okay...you said you wanted to do the research! (Meaning I know nothing about it, just found some stuff for you to look at)
Try these links and see if this is what you were looking for.
http://www.cwilson.com/resource/newsletters/article/118-new-directives-for-implied-status.html
http://www.cic.gc.ca/english/resources/manuals/ip/ip01-eng.pdf
http://www.cic.gc.ca/search-recherche/index-eng.aspx?search=basic&query=R.183&s=0&l=e
Here is a quote from the first link...
"A temporary resident must apply to extend their period of authorized stay before it ends. If they have done so, their period of authorized stay as a temporary resident is extended by law until a decision is made (R. 183(5)). The person is considered to have "implied status" as a temporary resident during that period."