Here's the "Important Note" section of David Moffit's 1979 guide on how to cover football for UPI:
The national sports wire opens at noon eastern time on Sundays. The allows a little more than three hours before the crush of pro football game stories. New York advises it is imperative that Monday AM stories reach the national desk by wire opening on football Sundays. Otherwise chances for good play will be reduced by later wire movement.
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