; (ii) for which the initially positive test has been confirmed by a second test using a different chemical process than the process used for the initial test; and (iii) which has been reviewed and certified as positive by a medical review officer with whom the House of Representatives or the Senate has entered into a contract to perform such reviews; and (B) does not include a drug test which shows only the presence of legal, over-the-counter drugs and drugs that have been legally prescribed for the individual involved. (2) The term controlled substance has the meaning given the term in section 102 of the Controlled Substances Act ( 21 U.S.C. 802 ). (3) The term Member , with respect to the House of Representatives, includes a Delegate or Resident Commissioner to the Congress. (4) The term random drug test means a test conducted for the purpose of detecting the illegal use of a controlled substance which is conducted— (A) on a periodic basis; (B) without advance notice; and (C) without individualized suspicion.