3. A securement system may be considered equivalent to a securement system prescribed by this Regulation if the operator establishes that
(1) it is designed to withstand the forces that result if the vehicle is subjected to 0.8 g deceleration in a forward direction, 0.5 g deceleration in a rearward direction and 0.5 g acceleration in a lateral direction;
(2) it provides a downward force equal to at least 20% of the weight of an article of cargo that is not fully contained within the structure of the vehicle; and
(3) the load on each component of the cargo securement system that reacts to a force referred to in paragraphs 1 and 2 does not exceed the working load limit of the component.