For effective use of the seat belt...
A)if necessary, place a cushion on the seat so that the belt is at the correct height.
B)disconnect the airbag because the seat belt is not compulsory when the vehicle has an airbag.
C)do not place anything on the seat in order to prevent the submarine effect.Correct
Placing covers, cushions or other similar items can cause the body to slide under the belt and be thrown forward, which is known as the submarine effect.