"until it is approved" is correct and usable in written English.
You can use it when referring to something that requires approval from another person or authority before it can be implemented or acted upon. For example, "We can't launch the project until it is approved by our supervisor."
The key bits: It basically requires Parliament to withhold its consent for any deal until it is approved in a referendum.
The company has avoided discussing specific terms of the agreement until it is approved by members.
The settlement is not final until it is approved by King.
(The new product cannot be sold until it is approved by the Environmental Protection Agency, which 3M says will take most of the rest of this year).
The commission cannot proceed with a formal investigation or issue subpoenas, however, until it is approved by a vote of the full commission.
Still, the recent decision by the antitrust staff cannot take effect until it is approved by Mr. James, although there are signs that he will follow the recommendation.
If an event requires multiple approvals, it will not be available in an approver's inbox until it's approved by the preceding approver(s).
The bank held off announcing its choice until it was approved by the Financial Services Authority.
He said there was no way to calculate the exact cost of the proposed system until it was approved.
One of the stated goals is "eliminating certification delays and improving cycle times" — how long it takes from the time an application is submitted until it's approved.
–The article notes that "in his statement, Ayatollah Sistani said the interim constitution would lack legitimacy until it was approved by a democratically elected national assembly".
