Safety helmets of the kind worn by motor - cycle riders and covering the back of the head down to the base of the wearer's skull, (excluding those of the four National Sub divisions below), neither having a chin - guard protruding from the head cover, nor having provision for attaching such a chin guard,with or without a visor but not having a coated or tinted visor that obstructs identification of the wearer, imported subject to SLS- 517 standard.

Chapter 65 · Headgear and parts thereof · 65.06