You can read the majority’s order here and the dissent here.

The question is technical, turning in part upon the power of the appeals court to issue a stay when the state has appealed. The court did not address the technical question of what constitutes a valid excuse to vote by mail under state law. As things now stand with this order, voters who are afraid of contracting the virus may request a vote by mail ballot.

But given that there is pending federal legislation over this question, and a new original action filed by the State of Texas in the Texas Supreme Court, I expect that there will be further orders on this question.