They do have to make you aware if you are subject to randoms but here is my recent experience with that. I took Killer's advice and subbed, much easier than you would think btw and since you go by Tia I will assume you are female so that gives you many more options on where you can stash the sub. I wore stove pipe slacks and knee high boots, got a head pad with an adjustable wrap to keep the temp good and no one was any the wiser. I passed and got the job and while in the break room noticed a memo on the fridge advising that as of x date everyone is subject to random. Basically pulling names out of a hat once a month. That is the only notice I ever received. Stocking up on synthetic now so when and if it happens I won't have to stress. Good luck on your test and if you want any tips and tricks for stashing from a female point of view holler.