LONDON—The U.S. authorities has offered assurances to the U.K. that Julian Assange would not be held below the strictest maximum-protection ailments if extradited to the U.S., a concession aimed at resolving Washington’s yearslong battle to place the WikiLeaks founder on demo on espionage fees.

The U.S. has also certain British authorities that Mr. Assange, if convicted, would be permitted to provide any jail time in his indigenous Australia, in accordance to excerpts of a court ruling offered by the U.K. Crown Prosecution Company, the general public prosecutor’s business for England and Wales.

A U.K. court on Wednesday formally permitted a U.S. authorities charm from a January ruling blocking Mr. Assange’s extradition. No day for a hearing has however been established.

A British choose in January refused to grant a U.S. request to extradite Mr. Assange on the grounds that he would most likely commit suicide if incarcerated in a federal maximum-protection, or “Supermax,” prison and subjected to included protection steps, this kind of as solitary confinement, which are typical pretrial arrangements in national-protection conditions.

The U.S. has offered the U.K. a offer of assurances that Mr. Assange won’t be held at ADX, a maximum-protection federal penitentiary in Colorado, or subjected to added protection steps, in accordance to the excerpts of the ruling, likely getting rid of a critical impediment to his probable extradition.