This is not governed by any government regulations, but is sadly an issue facing many travellers when your private jet is in maintenance and you are forced to mix with others.....
Let me rephrase that for you.....
This is not governed by any government regulations, but is sadly an issue facing many travellers when the airline that has a dominant position in their local airport decides to cram in more seats, sells hand baggage only fares and has no effective idea how to manage the operational fallout.