See WAC 180-51-050(1)(b) as another option to award high school credit on the basis of competency.
Wash. Admin. Code § 180-18-090
Statutory Authority: RCW 28A.150.220(4), 28A.305.140, and 28A.305.130(6). 04-04-093, § 180-18-090, filed 2/3/04, effective 3/5/04.