Signatures have always been required - the state Supreme Court has said a missing signature is one of the disqualifying mistakes a voter can make, along with the privacy envelope and, for now, the date the voter signed. This case was about whether, upon noticing a missing element (and thus a ballot that couldn’t be counted), election workers can notify the voter to either have them sign or toss the ballot and cast a provisional one to replace it.

You may be thinking of other rulings that said ballots can’t be tossed based on whether the signature matches what was in a voter’s registration, since the courts said signature matching by election workers is much more subjective and signatures can change day to day.