In a letter made public today, Sanders and Shine acknowledged that there are no formal rules for how journalists are supposed to conduct themselves at presidential news conferences, but that Acosta had violated "basic, widely understood practices" by asking multiple questions and refusing to yield a microphone during the president's news conference.
As a result, the officials said they would once again take away Acosta's ability to enter the White House grounds after the restraining order lapsed.
But today, Sanders and Shine said they had made a "final determination" that Acosta's pass is restored. "Should you refuse to follow [new rules] in the future, we will take action" to remove the pass.
Among the rules: Reporters must ask one question of the president at news conferences but can follow up with another if the president chooses. A reporter must then "yield the floor," including giving up a microphone. Failure to abide by these rules, the White House letter said, will result in revocation of a journalist's White House pass.
The letter prompted CNN to end its litigation against the White House.
The Administration's letter to CNN came after its lawyer, Theodore Boutrous, objected to the White House's threat to remove Acosta's pass after a restraining order expires. He wrote that such an action amounted to "retroactive due process".
In a separate letter to Shine and Sanders that was filed with the court, Boutrous said that the White House was attempting to impose "vague, unarticulated standards" retroactively in violation of the court's finding that Acosta wasn't given due process by the White House when it revoked his pass.
CNN had been seeking a preliminary injunction that would prevent the White House from suspending Acosta's pass until its lawsuit is resolved. Boutrous asked US District Judge Timothy Kelly to order the White House to file a formal response by tomorrow to CNN's request for the injunction.
Instead, the White House seems to have surrendered on the issue.
In a ruling seen as a victory for press freedom, Kelly, appointed by President Donald Trump, ordered the White House to temporarily restore Acosta's press pass while he considers the merits of the case and the possibility of a permanent order.
He said the White House has an obligation to afford due process to Acosta before it can revoke or suspend his access, and found that the White House's decision-making process in this case was "so shrouded in mystery that the government could not tell me . . . who made the decision."