As Fargoo has rightly said,.........." its not blindly following - it's best practice. Seals/O-rings cost pennies, not worth re-using to save a few pennies overall.'
I still couldn't see all the fuss about here. This question should not be ask here on an Engineering forum.
You as a licensed Aircraft Engineer is FULLY responsible to your action to sign a CRS. You as an LAE would bear the consequence for your action.
Of course, we may be talking about cowboy LAE.