I don’t think the Liga has such a restriction, but there simply comes a point where players just can’t put in the amount of time and effort needed while keeping another job.
I think I’ve told before the story of that year Tudelano had the chance to move up from their regional division into one where trips would be national. They spent the whole promotion competition doing the closest they could to sitting down on the grass and playing cards - the club did not have the money to pay for their players to drop their regular jobs, trips all over the country (possibly including the Canary Islands) are expensive, take more time and leave the players more tired than a bus trip of 3h/leg max… any player who didn’t drop his other job would have missed days in one or the other, or been too tired to perform properly in either.
Rearrangements on the upper regional divisions tend to cause so much yelling you’d think someone is being butchered, as teams which used to be in a relatively central position in the old arrangement find themselves in the edge of the new one, which means more travel time. Those whose geographical position is better in the new group do their best to look like they haven’t noticed :halo:.