In the "NOVA SCOTIA DEMAND: EXPRESS ENTRY STREAM" there is something stated as:
proof that you have performed the actions described in the lead statements for the occupation as set out in the occupational description of the NOC 2011, and proof that you have performed a substantial number of the main duties, as set out in the occupational description of NOC 2011 of your identified NOC code.
So, what is the document to prove the above, apart from the letter of reference where the employer clearly explains that I have fulfilled all the duties mentioned there?