mary jane stays in your system for 2- 3 months via pee tests... how are you going to "test" racers who smoke pot or have medical reason for using the "plant" ( it is legal in this state BTW) ... literally half the club would fail the pee tests ... unless you figure out how the popos are going to do d.u.i.d. testing ... there is no way for you to test a rider for mj . it just in your system for too long to regulate