Illustrator :: Exporting 1:1 Drawing At 1:100

I have someone doing a drawing and i am asking them to draw it at 1:1 instead of 1:100 even though the final result is going to need to be a 1:100 drawing in eps or pdf.
 
Is it extremely simple to get a eps or pdf at 1:100 even if the drawing is at 1:1 - while retaining clarity and/or detail etc?
 
My understanding is that they want this scale for publication but my thinking is that drawing at 1:1 is a much better idea in case i need to use this later.