Those would be different kind of regulations. Not just ‘you need functioning brakes’ kind, but also ‘you must serve this route that hardly anyone uses and and you cannot make any extra money from’. Or ‘no extra fees, even where some people would pay them’.
I like our European rules, when we are guaranteed PTO by law and employers would often force you to take it when you accumulated too much unused off days. The system cares even for those who would not care for themselves.