Hey. Thank you for the quick reply. I'll quote exactly what it says,
"This confirms that your application has been received by Immigration, Refugees and Citizenship Canada (IRCC) on September 18, 2021.
Please attach this letter to your present Study permit number XXX as proof that you are authorized to work for any employer, in any occupation with no restrictions on hours until January 16, 2022 or until a decision is made on your application, whichever is first."
This period of work is authorized as per subsection 186 (w) of the Immigration and Refugees Protection Regulations."
PS: The doc is IMM 0127 E. If you search on Google Images, you'll get an Idea about it.
Thank you