I once had a 3 day suspension for operating a D10 without my steel caps on..
OH&S grub had to climb up on the stacking conveyor to see my feet in the cab, get a photo and call me out of the pit..
He had it in for me as I challenged him on the boot style , I wore Redwings with a steel cap and he wanted laced boots on site , company didn't provide boots so I wore what I liked , and a few other blokes took up the Redwing style , only way to get me was because I'd slip them off and chuck'em behind the seat.. lol
Cheers