I.Don't. Think. So.

The headline is what I am objecting - this arbitrary assignment of precincts that MUST vote by mail, was never voted on by the voters, never discussed anywhere and reeks of a scam to me.

Proceed with caution.  Incidentally, it doesn't apply, apparently, to me as I didn't get one of these notifications.  It is from the party not my own.  Which is reason enough to be wary.