The preliminary MoU was electronically signed a day ago, and they will be in Geneva to sign the physical one. Following the signature, there will be a 60-day window for discussion on the pre-Memorandum of Understanding (pre-MoU). Anything can occur from the first day forward, and suspected there will be behind-the-scenes "settlements" made between the parties that are not publicly disclosed will be upheld.
The majority of the US government, key departments, financial sectors, and media outlets have uniformly urged that the uranium be diluted or destroyed before Iran can receive the funds.