With state it could be lots of things, for example: group, person, or nation. Might have talking points for negotiations; cut opium production by 20% over next two years; get release of two American agents in Western city; offer up to $200 million in support... as long as I don't say who or what location/nation this applies to it isn't classified, but if I do then very highly classified.
What heading?
How about Sensitive Compartmentalized Information
Opium = Afghanistan, perhaps Mexico or Pakistan. But the rest of the talking points would narrow it down.
get release of two American agents in Western city;
Is that another talking point or an new example from a different memo? If a new example then the rest of the talking points could ID the country that we are spying on. If the same memo, then the country is obvious and the memo is still classified even with the country name redacted.
There is one case where your scenario would be ok. Specifically the contents of the page are unclassified because a) every item on the page is marked unclassified and b) the totality of the items do no make it classified. But the page is from a classified document and so has top and bottom headers marking it classified. In that case security personnel could scan and send the contents without the top and bottom headers. It is unlikely that it applies to this case but it is possible,