The 1 April 2019 agreement with Yahua has a mutual agreement extension clause. Core has said customers are happy with the product and Core hasn't expressed trying to exit offtake agreements. The agreement has clearly been extended at least once (unless Core has been misleading in its presentations). While the July 2019 ASX release notes a 30 November 2023 end date, it also notes an ability to be extended by mutual agreement so I don't think your comments about Core's offtake with Yahua having ended are correct. It is something Core should provide improved clarity around.
The July 2021 DFS presentation pack slides noted that Core had a binding offtake to supply 75,000ktpa to Yahua for 4 years. By July 2021 Core knew they wouldn't be producing spod in volume until late 2022 at the earliest. IMO the contract has been mutually extended and would appear to have an end date of late 2026 at the earliest.
The PLS off-take agreement is not as you suggest on the day that Core's offtake contract with Yahua expired because it was neither on or that close to 30 November 2023. It wasn't 4 years after the July DFS. It wasn't 4 years after a likely production commencement date. While PLS may sign a Yahua contract around when the Yahua contract finally ends, that is unknown because its some time in the future.
The original 2019 agreement T&C's:
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