To amend the Public Health Service Act with respect to the provision of rehabilitation services under the program of block grants for the prevention and treatment of substance abuse.

Amends the Public Health Service Act to authorize appropriations to carry out provisions relating to substance abuse prevention and treatment block grants, substance abuse data collection, and a national data base on substance abuse prevention. Requires that States spend a minimum percentage of the grants on rehabilitation services (in addition to amounts required by other provisions for such services).