It is the policy of the Federal Government to offer appropriate prevention, treatment, and rehabilitation programs and services for Federal civilian employees with alcohol and drug problems. Short-term counseling or referral, or offers thereof, constitute the appropriate prevention, treatment, and rehabilitation programs and services for alcohol abuse, alcoholism, and drug abuse required under subchapter VI of chapter 73 of title 5, United States Code. Federal agencies must establish programs to assist employees with these problems in accordance with that subchapter.