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Some applications say list ALL dates of past and future LSATs on the application. Others aren't so clear.

I know they'll see it either way but do I have to list out each time I took the LSAT on the apps that don't explicitly say that?

I took it 3 times (1 cancel). I listed each date.
They are going to see this anyways so no point in even remotely coming off like I am trying to mislead them or w.e.

If they don't ask for future dates, then I wouldn't list a future date (if I didn't want to).
I'm not registered for a future date so this doesn't apply to me, but hypothetically speaking.