Vending machines GFCIs are not required to be readily accessible. Only those GFCIs listed in 210.8 have to be readily accessible
I agree with you Tom the only problem as I see it is how do you access the GFCI device to test it, if it is a part of the cord as allowed in 422.51. I thought one of the major reasons
for GFCI's being readily accessible was to allow easier testing of the devices.