Hi every body
I want to know where can I make hole to respect this law:

"IC2.7.3 Belly pans must be vented to prevent accumulation of fuel. At least 2 holes, each of a minimum
diameter of 25 mm, must be provided in the lowest part of the structure in such a way as to prevent
accumulation of volatile liquids and/or vapours."

Should it be in the floor panel?
if any body can show sample of this in pic it will be more useful,
Thanks