When I go to the template you suggested, under Aspect ratio it only says 16:9.
I delivering an HD copy but am being told to make it 4:3 Center=cut safe.
From TV station
“• Due to the preponderance of 4:3 viewing, all Content should be “Center-Cut Safe” HTV is not responsible for non center-cut safe Content. See Exhibit A for a representation of “Center Cut Safe”.
•Only the HD Copy of the Commercial is required. The HD Copy of the Commercial will be “Down-converted” and Center-Cut for broadcast on the SD Channel where a SD channel is still present.”