As for the Hop On Hop Off tours in Italy, access to small and medium-sized pets is allowed so that they are harmless and only if they respect the characteristics listed below. It remains understood that the driver may deny access to the animal on board if he believes that his presence on board could damage the safety of the vehicle and passengers. The animal can also be removed at a later time, without the right to ticket refund, at the discretion of the on-board staff, in the event that it may cause disturbance or danger to the people on board the vehicle.        The use of a leash and muzzle is mandatory, however the use of the pet carrier is allowed as an alternative to the muzzle. Pets with particular anatomical, physiological or pathological conditions that cannot use a muzzle must travel inside a pet carrier or cages. The keeper must make sure that the pet carrier is not in a state of degradation, that it has no food inside, that it is in excellent clean condition, and that it doesn’t harm people on board the bus.   The keeper must also ensure that the animal does not create disturbance or damage to any of the passengers or staff on board and that it doesn’t soil the vehicle, under penalty of compensation for the damage caused. The owner of the animal or holder is liable for damages caused by the animal pursuant to article 2051 of the civil code. Access to guide dogs for the blinds  is allowed as long as they have a muzzle and leash. The access of pets on board the vehicle is free as long as they are accompanied to a paying passenger. Access on board the vehicle for ferocious and/or poisonous animals is prohibited.