Okla. Stat. tit. 13, § 13-40: Carriage and delivery of luggage

A common carrier must deliver every passenger's luggage, whether

within the prescribed weight or not, immediately upon the arrival of

the passenger at his destination; and unless the vehicle be

overcrowded or overloaded thereby, must carry it on the same vehicle

by which he carries the passenger to whom it belongs except that

where luggage is transported by rail, it must be checked and carried

in a regular baggage car; and whenever passengers neglect or refuse

to have their luggage so checked and transported, it is carried at

their risk.