The phrase "agreed prior" is correct and usable in written English.
It can be used to refer to something that was agreed upon before the current discussion or situation.
Example: "As per our agreed prior terms, we will proceed with the project as planned."
Alternatives: "previously agreed" or "agreed beforehand".
Since the referendum, it said it had exchanged 11 long-term retail leases on terms agreed prior to the vote.
Libya agreed prior to Mr al-Megrahi's trial that anyone convicted of the Lockerbie bombing would serve their sentence in Scotland.
For the purposes of clarity to both parties, any variation of our terms must be agreed prior to publication and shall be subject to the approval of the Managing Editor or his/her nominees.
We mentioned our decision to Canaris, who also was of the same opinion and Canaris thereupon went down to Keitel in order to induce him to leave the Military Abwehr out of all such matters and requested that, as agreed prior to this, such matters should be left entirely to the SD.
Gisby had been due to receive a bonus of up to £371,000, but Network Rail said he would be leaving in February without any additional payment beyond that stipulated in his contract, in a deal agreed prior to the Christmas travel problems.
Russia, a non-OPEC member and the second largest producer of crude oil, will also attend the meeting and is ready to freeze its production at the January level as it had agreed prior to the Doha summit.
The study said altering the news feeds was "consistent with Facebook's data use policy, to which all users agree prior to creating an account on Facebook, constituting informed consent for this research".
The Secretary may agree, prior to his sale of any such loan, to guarantee to the purchaser (and any successor in interest of the purchaser) compliance by the borrower with the terms and conditions of such loan.
The authors were able to conduct the research because in their words, automated testing "was consistent with Facebook's Data Use Policy, to which all users agree prior to creating an account on Facebook, constituting informed consent for this research .UPDATE: It turns out that Facebook conducted their research four months before adding "research" to their data use policy.
2C – the amount global temperatures can rise by to provide a chance of avoiding catastrophic climate change, as agreed at prior negotiations.
In 10 μs simulations, conformational equilibria of mannosyl cores, sialyl Lewis (sLe) antennae, and constituent sub-sequences agreed with prior refinements (X-ray and NMR).
