SMOUC
I have seen people carry just about anything on those seats: from golfclubs to dogs.
What is the formal instruction that forbids this ?. Is there a differnce between professional and private use ?
What about a dog : on a long trip it is in a cage that just fits in the rear seats and can be kept by the seat belt.
On short trips she just sleeps on a seat, and as she does not use a seatbelt this is probably not OK...
This btw sometimes also makes me hesitate when replying to the question from ATC : how many POB.... do animals count...
Delta3