I know I have to take the lab exam witin one year after I passed the written exam, otherwise I have to retake the written exam in order to be qualified again for the lab exam. What I would like to know is that what if I fail the lab exam, and now my written exam one year period has passed? Do I still need to retake the written exam? or is there a period the wriiten exam can be wavied before the second go? Thanks.