Alex,
Yes the ip sla with object tracking do support on 12.2(33) SXH5 and later.
http://www.cisco.com/c/en/us/td/docs/ios-xml/ios/iproute_pi/configuration/12-2sx/iri-12-2sy-book/iri-pbr-mult-track.html#GUID-16C12D82-0E4E-4872-B9DC-D32E3EE871BA
HTH
Regards
Inayath
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