Here's another one that I can't seem to find anywhere. I am not looking for nested validation or dependent drop downs, I know how to do that. Maybe what I want is simpler but I'm just not seeing a solution... I have attached a sample worksheet. What I want is a self-populating list that is dependent on a single criteria, but that criteria changes. If certain conditions are met, then the criteria "unlocks", and all unlocked values go in the list. Please check out the sample to see what I am asking for. I'm pretty frustrated with it right now. I know a bit of VBA, and am not shy of it, so maybe that holds the solution? Advice appreciated. https://www.dropbox.com/s/n5nu4m73ulj2km9/sample problem.xlsx?dl=0