We are using Brtools v 35 on HP-UX 11.31. Here is how we have the permissions set up:
# ls -lrt br*
-rwsrwxr-- 1 oradev sapsys 24876864 Nov 25 2013 brarchive
-rwsrwxr-- 1 oradev sapsys 25321368 Nov 25 2013 brbackup
-rwsrwxr-- 1 oradev sapsys 30371736 Nov 25 2013 brconnect
-rwxr-xr-x 1 devadm sapsys 26120664 Nov 25 2013 brrecover
-rwxr-xr-x 1 devadm sapsys 15959080 Nov 25 2013 brrestore
-rwsrwxr-x 1 oradev sapsys 32363760 Nov 25 2013 brspace
-rwsrwxr-x 1 oradev sapsys 17255728 Nov 25 2013 brtools