My question involves labor and employment law for the state of: Michigan

Hello,

I've been working for an auto manufacturer as a contract engineer for one year of a two year contract. When I hired, I was told I would be working and be compensated for overtime and have been doing so for the past year and even though I'm supposedly an exempt employee, I've been getting overtime compensated at 1.5 times my computed hourly rate (my contract is per anum). Now, my contract house (Indian firm with US base in NJ) changed their 'policy' and will only pay straight time. When joining this firm, I had to sign a lot of paperwork. One of those was called an Anexures document which stated that if eligible, I would be compensated at 1.5 times regular pay for overtime. My question is, can this 'policy' change be forced on me?

Thanks.