The Alcohol Use Disorders Identification Test (AUDIT) is a 10-item screening tool developed by the World Health Organization (WHO) to assess alcohol consumption, drinking behaviors, and alcohol-related problems.
A score of 8 or more is considered to indicate hazardous or harmful alcohol use. The AUDIT has been validated across genders and in a wide range of racial/ethnic groups and is well suited for use in primary care settings. Detailed guidelines about use of the AUDIT have been published by the WHO and are available online:
http://whqlibdoc.who.int/hq/2001/who_msd_msb_01.6a.pdf
As for copyright, the AUDIT is a WHO-approved instrument and is in the public domain for use. The key research paper to cite for the AUDIT is: Saunders J.B., Aasland O.G., Babor T.F., de la Fuente J.R. and Grant M. Development of the Alcohol Use Disorders Identification Test (AUDIT): WHO Collaborative Project on Early Detection of Persons with Harmful Alcohol Consumption II. Addiction 1993; 88:791-804.