A valid work permit is a work permit that it's not expired. if you want to change your work, if you want to work as a nurse, health care...you can apply for a new work permit with this new employer but only part time if you have a valid work permit, if not, forget about it.
You can get a labour market opinion letter, contract...but they will approve only a part time work permit, if the officer approve....it's what they said...you can call cic and ask it.
I have a expired work permit, I'm in the implied status and I want to work as a rehab but I can't because I need first renew my work as a caregiver then apply for work permit as a rehab.
I'm not sure who is more stupid, me for accept this program or the CIC for make this program so #£¥*^€
Who made this program never thought about health care, change employers, study permit, any support...it's stupid!!!