VEX Product Line "Cross Listed" Parts

The Bank Shot game manual rule <R6c> states, “Products from the VEX product line that are also cross listed as part of the VEX IQ product line are legal.” Where would one find such a cross-listing? In particular I’m looking at the VEX EDR anti-slip mats. I’ve seen them used on IQ robots and been told they are legal and I’m trying to determine (1) is that true, and (2) if so how do I know that for this or any other item not sold explicitly on the VEX IQ products page?

Thank you in advance,
Chris

All cross listed parts would be found on the VEX IQ website. Here’s an example: http://www.vexrobotics.com/vexiq/products/accessories/rubber-bands.html

No, this is not true. VEX EDR anti-slip mats are not cross-listed as VEX IQ parts, nor are they legal for use in the VEX IQ Challenge

All cross listed parts will always be listed on the VEX IQ website.