Are automotive Power Door Lock actuators legal?

[jpcuzzourt]

Hi. I'm a new mentor for our FRC team and I wanted to check the legality of a potential actuator for 2015 FRC. Automotive power door lock actuators are often made with a small reversible 12V DC motor with a rack and pinion to push or pull a door lock control rod. Are these actuators legal under R18 as a "door motor," or otherwise. Is this the right place to ask?
These are commonly available as "Universal Power Door Lock Actuators" for about $5.00.
Thanks for the help.