If you read your application guide at http://www.cic.gc.ca/english/pdf/kits/guides/EG7.pdf on page 4 it says that you may apply if:
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you have an offer of arranged employment in Canada. The employment offer should be:
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in writing,
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indeterminate in duration, and
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meet the arranged employment factor described in this guide.
and on page 14 it has the arranged employment factor mentioned above and also says that you may claim points if:
You are currently working in Canada in a job that is Human Resources and Skills Development Canada (HRSDC) confirmation exempt under an international agreement or a significant benefit category (e.g., intracompany transferee)
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Your work permit is valid when you apply for a permanent resident visa and
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Your employer has made an offer to give you a permanent job if your application is successful.
Note: Your work permit must be valid at the time your permanent resident visa is issued.