If State Election authorities must rely in full or in part on the DMV / I wonder how quick it’s done?

A registered voter’s application for a driver’s license is written proof that he is now a legal resident of the state in which he is applying for the license.

Documentation received from a DMV that a registered voter now holds a driver’s license in a different state proves that his eligibility to vote is in the new state.

Such certification is written proof under the NVRA that a voter should be removed from his previous state’s voter registration list.