The rules for the FIRST game and robots are very well laid out and strongly enforced at the competitions.
Robot rules are part of the inspection process and a robot that does not pass inspection cannot compete. It is important to remember that the robot rules are rules, not just suggestions.
The rules change every year, and some parts, movements, and robot actions that were legal in one year, are not legal the next and the same in reverse. Be sure you read and understand the rules.
If a rule is not clear, post a question on the FIRST Q+A or ask when you get to the event.
Here is the link to the 2016 Game “Stronghold” Link