Wether an accountant is covered under labour act

One of my friend asked me wether an accountant is covered under labour law, i was not able to answer his query, on asking further he told me that he is doing job as an assistant accountant  in a pvt ltd co. which is in service sector. and his time for office was from 8.30 a.m to 9.30 p.m. He was hoping there might be a minimum hour for working for him. And he might be covered under labour law. If this is so he could claim either a overtime payment  or would claim for his right work hour. plz resolve