One Set of Fields or Another Required

[eluser]Aken[/eluser]
What's stopping you from doing that going by the first method? Your goal is to require one or the other - it doesn't say that if you require start/stop time, then hours will do absolutely nothing. This is just for setting your rules. You could do what you want with a IF/ELSE IF/ELSE set.

I get wanting to learn and understand CI. But if a CI feature doesn't work exactly for what you want, there's no requirement to use it.

And again, these are just other options. Use whichever one you like the most, they all do the same thing in the end.