Why in the hell is any state asking the feds for permission to do anything.
That was my question ...
Anyway, the various state standards were too varied to reconcile into a single, nationwide standard. That's why Article I § 2 was written as: The House of Representatives shall be composed of members chosen every second year by the People of the several States, and the electors in each State shall have the Qualifications requisite for Electors of the most numerous branch of the State Legislature.
Outside of gender and race amendments to the constitution, I don't understand where the uniparty in DC has any legitimate power at all to determine voter qualifications.