Seat Belts

[mistralshining]

Just wondered if anyone knows when seat belts in the back became compulsary to have manufacture fitted in the car.

I have a Nissan Silvia 1.8 Turbo its a 1984 (B Reg).

There were none in the car when bought and i cant see anywhere to bolt them on above the shoulder.

Any ideas?!?!

Also if it is meant to have them anyone got any ideas where i can get some from cheaper then main dealer where it seems the only place to get stuff for it from.

Cheers Peeps. x