We would expect the rise in non-mutually recognised State occupational licenses to reduce labour mobility across State lines.

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

Many service members and veterans are required to repeat education or training in order to receive industry certifications and state occupational licenses, even though much, and in some cases, all, of their military training and experience overlaps with credential requirements.

WHITEHOUSE: Joining Forces Blog