in this case, 3-1 FS, it would fall under no. 2 (25% or greater) which would make the ex-date the day after the paydate, both being after the record date.
you must own it the day before the ex-date at the close to get the split. I don't care when ya buy it.
3 day rule to settle does not apply.
at this point we don't know when the ex-date is or the paydate.