Hi egam,I don't think you are listening. You cannot claim 4012 as a work experience under Canadian Experience Class.
"Self-employment and work experience gained while you were a full-time student (even if you were on a co-op work term) doesn’t count towards the minimum requirements for this program."
https://www.cic.gc.ca/english/helpcentre/answer.asp?qnum=394&top=29
So unless you claim it under Federal Skilled Worker Program, which I think you cannot since you study in Canada, you cannot use this work experience getting points under CEC.
Unless this work experience was after your studies, then it is fine.
Please read IRCC website.
I am NOT claiming it under CEC, it was under FSW. I won't get ANY point at all for this experience, it just makes me eligible to apply under FSW and then rely on other points to get selected. Thanks.
https://www.cic.gc.ca/english/helpcentre/answer.asp?qnum=855&top=29
If you search around, NOC 4012 is the exception to the rule above you just posted. (read the link). It doesn't give you points but it does make you eligible.