Every connection for charging a gas container shall be outside the vehicle and in the case of a public service vehicle no such connection shall be within 610 mm of any entrance or exit.

An efficient shut-off valve shall be fitted as near as practicable to the filling point.

Provided that in cases where compressed gas is not used a cock or an efficient non-return valve may be fitted in lieu thereof.

Where compressed gas is used an additional emergency shut-off valve shall be fitted adjacent to the valve referred to in sub-paragraph (2) of this paragraph.

A cap shall be fitted to the gas filling point on the vehicle and where compressed gas is used this cap shall be made of steel with a metal to metal joint.