Independent Joe Davis last week was denied a spot on the upcoming November 7 ballot for Mayor of Bloomington, Indiana, because he gathered new voter registrations while petitioning but did not turn the registrations in for processing at least seven days before turning in the petitions that the newly registered voters had signed. Because of this, many signatures of newly registered voters were deemed invalid, and Davis ended up with fewer signatures than he needed to make the ballot. Davis v Morales, Monroe County Circuit Court, 53C08-2308-MI-1910.
Here is a story on this matter.
In 1970, a 3-judge U.S. District Court struck down a New York law that said newly-registered voters could not sign a petition. Socialist Workers Party v Rockefeller. The U.S. Supreme Court summmarily affirmed that decision, so it should be binding on the entire nation. 400 US 806.