format for cron.deny?

["Carl Wilhelm Soderstrom" <carls@agritech.com>]

        what's the format for the /etc/cron.deny (and /etc/cron.allow) files?
        if I put simply "ALL" in cron.deny, will that deny root cron
priveleges as well?

thanks,
Carl Soderstrom
System Administrator    307 Brighton Ave. 
Minnesota DHIA	        Buffalo, MN	
carls@agritech.com      (612) 682-1091