Now remember, the rate law can only really be found experimentally via results. But this is a second way with which you can find the rate law. But you still need to actually find the rate law using the results. And then you can check the two and see if they coincide. And usually for the most part they will coincide. So this is a second way that you could find rate laws in complex reactions by using the rate law for the slow step, the rate determining step.