On whose authority is Ukraine “legally banned from negotiating”? Seems to me that a sovereign nation has nobody to answer to in such matters.
VERY exacting Question!
Zakharova assumes we know very well it was the West who intervened against that early Peace agreement, drafted between Zelinsky and Putin.
She did not answer your question concerning “not Legal”.
Was it lost in translation?
Otherwise, I’m given to believe that NATO is a global force of Law, and as a loan shark over its borrower, forbids its dependent charges (aka either sacrificial agents, or willingly useful idiots) from Ending wars NATO wishes continued.
“Legal obligation” for UKR was laid between the proverbial rock and a hard plce.