1. Executive Order 12564, Drug-Free Federal Workplace, 51 Federal Register, 1986, pp. 32889–32893, available at http://workplace.samhsa.gov.
2. Mandatory Guidelines for Federal Workplace Drug-Testing Programs, Federal Register, 53, 1988, pp. 11970–11989, available at http://workplace.samhsa.gov.
3. Mandatory Guidelines for Federal Workplace Drug-Testing Programs, Federal Register, 59, 1994, pp. 29908–29931, available at http://workplace.samhsa.gov.
4. Mandatory Guidelines for Federal Workplace Drug-Testing Programs, Federal Register, 63, 1998, pp. 63483–63484, available at http://workplace.samhsa.gov.
5. Mandatory Guidelines for Federal Workplace Drug-Testing Programs, Federal Register, 69, 2004, pp. 19644–19673, available at http://workplace.samhsa.gov.