I'm helping a friend put in a spa and was wondering if it is acceptable to put a double-pole breaker for the spa on the bottom part of a split bus panel. The bottom part has about 5 or 6 branch circuits protected by a 60 amp main. My experience is mainly commercial and some residential, no spa installs. I know to install a disconnect within 5'of the spa and so forth. My only concern is this crazy split bus panel. Any help would be appreciated.