My question involves labor and employment law for the state of: Washington

I was hired several months ago at an aviation training facility as an instructor. During the instructor orientation we were told that there would be a minimum "commitment" expected from the instructors in terms of hours of instruction given. If we were to quit or be fired before meeting that minimum, we would owe the company a sum of money proportional to the unmet commitment. I feel that there may be safety and general company culture issues and would like to leave my job, having not yet met my commitment. We were told about this rule verbally during the instructor orientation and given a handout explaining it. I never signed or verbally made any agreement to this "payback" policy. In fact, the purpose of the "commitment" is in part to make sure people don't take advantage of the initial instructor checkout flights then suddenly quit. However, I was made aware of this policy after having completed my training check flights.

Given the above information, if I were to quit, would the company have any case in pursuing legal action again me for not paying for my unmet "commitment"?