In AR, workers who are fired by a corporation must be paid their last paycheck within seven days of being fired, if demanded. In all other cases, payment must be made at the regularly scheduled payday. So for a sole propitiator or partnership or LLC not taxed as a Corp, it's currently the next payday. It's also current law that you can not deduct from a paycheck any amount that would reduce pay below minimum wage, even if the employee had agreed to the deduction..
The idea that bugs me the most, though, is the idea that the amount should be doubled, in cases where there is a dispute that delays a paycheck. I do agree that employers have no rights, under current law, to withhold pay over such disputes, but this still seems like over-reaction to me.