Did you know that the faller is responsible for the outcome of purchaser mark sales? So, if you are doing that and notice that the marking is not getting the correct trees cut, you'd best stop and get things fixed. Or cut the correct trees.
Yup. And being color-blind isn't an acceptable excuse for going over the line. We used to work every year on a selective sale that had three different agencies regulating it. There were also representatives from other "interested agencies"...mostly 'ologists of many different kinds. The three main agencies argued with each other a lot about paint colors, marking techniques, skid trails, and anything else they could think of.
I tried everything I could think of just to get them to talk to each other, and talk to me too, so I'd know what they wanted.
We solved the confusion by going out with the marking crew when they did the actual marking and then cutting quick before they changed their minds.
MY BIL, who was also my falling partner, summed it up pretty good..."Hell, those people would argue about oatmeal mush".