Goal Nets and the Laws of the Game

FIFA's Laws of the Game runs to some 142 pages.

Of those 142 pages, only 26 words are are allocated to goal nets.

Nets may be attached to the goals and the ground behind the goal, provided that they are properly supported and do not interfere with the goalkeeper. 

That the nets have to be "properly supported" has seen the evolution of the various support systems. 

That the nets must not "interfere with the goalkeeper" shouldn't exclude any club or stadium manager installing the support system of their choice.

So why does nearly every stadium in first class football have box nets? Because FIFA have deemed any other support system unsafe.

In their Stadium Book, under 'Dangers and Obstructions' FIFA adds 31 words more to the rules on goal nets.

Goal nets should not be suspended by any metal frame or "elbow" but should be suspended by the method illustrated as this does not constitute a danger to the players. 

The method illustrated?