pigy888 said:
and it also states " ... former PGWPP..." ?
From the text you posted I understand that your employer does not have to proof the advertising part for the grace period of 90 days after your work permit expired, if she\he has the intend of hiring you.
However, since your permit expired, aren't you out of status right now?
Unless you applied for the work permit (i don't think you did), I believe you've to restore your status first and if that gets approved, you can apply for the work permit. If that's the case, you're not on implied status and not allowed to work until you've received the work permit. So be careful with work on Monday.
see http://www.cic.gc.ca/english/information/applications/guides/5580ETOC.asp#5580E4
But don't take my word for anything :-X , but that's my understanding of how the system works.