H1B stamping in canada, Can i work during change of status?

Hello guys,

I haved my canada stamping on sep 23rd, 2013 at Vancouver Canada.

I have my H1B I797 (H1B premium approved on April 18, 2013) which is going to start on Oct 1, 2013.My OPT extension expired on May19, 2013 ,and i have my cap gap extinsion provided by my university international advisor till Sep30, 2013.

If I get my H1 visa stamped on sep 23rd then H1 will start from OCT1 , but can i work during sep23-sep30 ?

Thanks in advance.