In the case of lawyers, there are significant sets of state-specific laws and regulations, so it makes some sense to have separate "certification" by state. My

In the case of lawyers, there are significant sets of state-specific laws and regulations, so it makes some sense to have separate "certification" by state. My understanding is that, once you have been an attorney for a certain number of years (5?), it is much easier to be admitted to the bar (certified) in a new state.