Grd check satis
I found this in my "Black Book Notes"
ATC RESET AS PER FCOM SUPP PROCEDURES TO BE CARRIED OUT (I believe that came from either SQ or EK)
You could try reading the FCOM on board the aircraft type you are referring to.
Also, try searching "CPCLC" in the TSM and AMM to find an actual manual reference to sign it off.
Also talk to one of the more proactive Moon Goons in Maint Watch and they may be able to get feedback from Flt Ops.