memo•ran•dum /memrndm/ noun (pl. memo•randa /memrnd/)
1 (formal) = memo: an internal memorandum leaks of confidential memoranda
2 (law) a record of a legal agreement which has not yet been formally prepared and signed: The two sides have signed a memorandum of understanding aimed at ending the conflict.
3 a proposal or report on a particular subject for a person, an organization, a committee, etc.: a detailed memorandum to the commission on employment policy
©Oxford University Press, 2005
It would actually appear that what is being presented at the briefings is exactly what the NTUS are saying.
It is a record of a LEGAL agreement yet to be formally prepared and signed. This means the final document which will be signed, only in the event of a yes vote (hence why it is still only a memorandum of understanding), will be the legally binding document. Unless I am very much mistaken, what is being presented is the memorandum and the legal teams are in the process of drawing up the final document.