(1) For the purposes of Title 46 RCW, a person shall be deemed to have undertaken and followed a course of treatment for alcohol or drug abuse on a program approved by the department of social and health services if he or she has been under said program for at least sixty days: Provided, That the department may accept a shorter treatment term upon a showing that the full sixty days of treatment would not be in the best interests of the person's recovery progress.

(2) The term "program approved by the department of social and health services," as used in Title 46 RCW, shall mean an alcohol or drug abuse treatment program meeting the requirements of chapter 388-305 WAC.