How many seats that are not securely fastened to the bus are typically allowed?

In a commercial passenger vehicle, such as a bus, it is critical for safety that all seats are securely fastened. This requirement is in place to ensure that passengers are properly restrained and protected in the event of sudden stops or accidents. Allowing seats that are not securely fastened poses significant risks not only to the passengers seated in those places but also to others in the vehicle. In order to maintain a safe environment, regulations typically dictate that there should be no seats that are not securely fastened, highlighting the importance of stability and passenger safety within public transportation vehicles. Therefore, having zero unsecured seats ensures compliance with safety standards and protects the well-being of everyone on board.