Ziptie and pnematic tubing legality

Would the blue zip-ties and pnematic tunic be legal?
The wording in the manual is quite confusing

What exactly is confusing you? What would make blue zip-ties illegal? What’s a pneumatic tunic?

I assume from the subject line that “tunic” is an unfortunate auto-spell-correct of “tubing.”

Any color of pneumatic tubing is legal, as long as it is the proper diameter. For securing wires, any size or color ziptie is acceptable, but if the zip ties are structural or part of a mechanism, they must be the size and type sold by VEX Robotics.

What rule allows them?

<R7b> for the different colored tubing and zipties, <R7l> for any size zip tie to secure wires and said tubing.