The reargument took place in October 1972, and Justice Blackmun led on drafting the final opinion. The justices voted 7-2 in favour of this opinion, with Justice White and Justice Rehnquist dissenting.
The decision was published on 22nd January 1973. It appeared on newsstands before formal publication, as Justice Powell had given a copy of the decision to a journalist with the understanding they'd publish it before the date of the next issue of Time Magazine, but it leaked.