I doubt they’ll recover any bodies, but if they do, there should be some kind of agreement among the parties involved. Since it is still being negotiated, why would they release the content?
Just what kind of agreement is necessary when recovering the remains of anyone, outside of notification and disposition of said remains to the next of kin?
According to ICAO rules and without any agreement to the contrary, if any part of this aircraft is recovered including black boxes they are flown immediately to Kuala Lumpur and put under Malaysian jurisdiction which is in charge of the investigation.
None of the 14 nations involved want that to happen thus I suspect they have all deferred to Australia, including the US, Britain, and China, hoping for it to atleast emerge as an equal partner with Malaysia in the investigation.
It’s possible that politics is holding up the “finding” of the aircraft and until this agreement is signed nothing will be “found”.