Flex in non-flexible wings

How do the Bulls grind off the front wing endplates and still pass the 100kg static load tests ?

Or , perhaps more appropriately , how is it that...

Source: http://www.motorsportforums.com/forums/showthread.php?141791-Flex-in-non-flexible-wings&goto=newpost

Stuart Aspin Len Atlee Pierre Audry Karl Auer