Okla. Stat. tit. 47, § 47-11-1104: Obstruction to driver's view or control - Overloading

school bus.

(a) No person shall drive a vehicle when it is so loaded, or

when there are in the front seat such a number of persons, exceeding

three, as to obstruct the view of the driver to the front or sides

of the vehicle or as to interfere with the driver's control over the

driving mechanism of the vehicle.

(b) No passenger in a vehicle shall ride in such position as to

interfere with the driver's view ahead or to the sides or to

interfere with his control over the driving mechanism of the

vehicle.

(c) No school bus shall be operated on the streets or highways

in this state when loaded with passengers in excess of the number

for which such bus is designed to carry. The number of passengers

determined by the local school board which the bus is designed to

carry shall be posted in a conspicuous place on the bus.