I think I got it... how does this look?
set security address-book global address-set rfc1918 address class_a
set security address-book global address-set rfc1918 address class_b
set security address-book global address-set rfc1918 address class_c
set security address-book global address class_a 10.0.0.0/8
set security address-book global address class_b 172.16.0.0/12
set security address-book global address class_c 192.168.0.0/16
set applications application http protocol tcp
set applications application http destination-port 80
set applications application https protocol tcp
set applications application https destination-port 443
set applications application-set web_services application http
set applications application-set web_services application https