The 75% passing score on a literacy test was too high, and "minimum qualifications" required only passing scores in the 66%-to-70% range.

FORBES: Quota? What's That?

Licensing standards vary by state and occupation, but typically require a minimum level of education in a specified field and a passing score on a test of competence.

FORBES: A Use For The Commerce Clause: Increasing US Labour Mobility Through Occupational Licensing