Confused on limit of executive positions in clubs

Currently hearing back from a few clubs regarding multiple roles, all of which are executive, but not quite VP or Director level, with one CFO role.

I am just wondering, could I theoretically accept all of them if we were to ignore the workload? I am genuinely very interested in all of them, not for the names but the actual work I'll be doing.

I know there is some kind of rule about there being a limit on what you can do and how many high ranking executive positions you can have, but I've dug through the depths of the internet and haven't seen anything defining that exact rule. Where can I look?