I am auditing a Cooperative credit society of HUL..which also provides transport facilities to HUL's employees, who are all its members. The society has hired 3 buses and pays monthly hire charges alongwith diesel expenses and driver's salary. The owner of the buses charges service tax on an amount, (i.e. hire charges+diesel expenses+driver's salary). I just want to know that under which service the person is charging service tax because under the Rent-a-cab service, the serive tax is payable on hiring of motor cab or maxi cab and the buses do not come under the definition of these cabs. So please clarify if the person is right in charging of service tax.