VEX Rack and pinion. Legal?

We want to use the Vex 393 motor along with a rack and pinion system. We have tons of Vex parts available to use, but I am not sure if the use of Vex rack and pinions are legal. does any one know? I’m looking on the FIRST site now.

While this is not the official forum for Q&A answers, VEX rack and pinion gears are FRC legal.

Relevant Q&A Post:

Q. Can we use VEX parts on our robot? FRC3791 2012-01-18
A. There are no rules expressly prohibiting any particular brand. Please note that there are many rules regarding what specific items may or may not be used on the Robot throughout The Robot section of the Game Manual.