Res1 さん、ありがとうございました!
結果が分かるまで合法的に滞在できるのであれば、おとなしくカナダで Study Permit 申請の返信を待つことにします。
無回答さん、Res1 さん、本当にありがとうございました。
P.S. 再度 CIC に目を通してみたところ、以下のような情報を見つけました。
http://www.cic.gc.ca/english/resources/manuals/op/op11-eng.pdf
OP 11 Temporary Residents
24. Implied status
(Replaces OB 092 – January 15, 2009)
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 [R183(5)]. Such a person is considered to have implied status as a temporary resident during that period.
If a temporary resident applies for renewal of their work or study permit and their permit expires before a decision is made, R186(u) and R189 (the right to continue working or studying under the same conditions pending a determination of their application for renewal) apply only as long as
the person remains in Canada.