A pupil who enrolls in an institution of higher education in grade eleven may not enroll in postsecondary courses under RCW
28A.600.300 through
28A.600.390 for high school credit and postsecondary credit for more than the equivalent of the coursework for two academic years. A pupil who first enrolls in an institution of higher education in grade twelve may not enroll in postsecondary courses under this section for high school credit and postsecondary credit for more than the equivalent of the coursework for one academic year.