3Other firms should take account of the regular monitoring rule (SYSC 4.1.10 R) as if it were guidance (and as if "should" appeared in that rule21 instead of "must") as explained in SYSC 1 Annex 1 3.3 R(1)21, but ignoring the cross-reference to SYSC 4.1.5 R and SYSC 4.1.9R21. 5