I only skimmed through the period just before Op CRUSADER. There are detailed instructions on what markings to paint onto AFVs, and where, in respect of the "crusader stripes" and the arrangement of pennant flying. Instructions came from the very top. As regards other markings that are of a more permanent nature, there is nothing written in the period l skimmed. But l know such exists somewhere as, over the years, l've seen documents detailing such. One such sticks in mind as it was an instruction how to paint up the "Caunter scheme". It sticks in my mind because the colors it specifies are not the ones that the "internet experts" claim.