You can do certain things to have it not show up on a drug test.... but generally completely out of your system is about one month.... theres smart ways to cover it up, and theres stupid ways... like bleach... if its really important id do research on it..
my friend once told me if you chug Aquarium cleaner, it gets it out.. lol. I asked if it also kills you. it depends on the person, how much you smoked, and shit. .. if you work out and then sit in a suana that gets a lot of shit out of you.. I don't know if it gets pot out but, if you do some research on it, i'm sure you'll find out. theres like a certain way to do it and stuff. .. I know that many Scientologists know about it, so if you know any, you might want to ask them.
my frnd, in india..had do this drug test...it took him a approx 3 weeks to get negative result, i.e to get weed cleaned out..he used to smoke a LOT! everyday every moment kinds. smart trick: in india its easy to get a doctor whod write a prescription saying he gave u drugs coz of psychological treatment,.he kept that as back up! lol!! anyways since im sure yu guys cant do one of those false report things..anyhow best of luck!