Chhatisgarh vat wct tds

I have a shoowroom in chhatisgarh where some civil and electrical work done at contract basis.

The contractor is from other sate and he is a register delear in other state. As iam a regisgter vat delear in chhatisgarh state shall i need to deduct the WCT - TDs to the contractor and need to pay the same to Chhatisgarh vat deparment.

Dear Experts please clarifiy, as i have confession that for unregister delears controctors need to be deducted for 2 to 4 percent. 

BUt my case he is a delear in other state and his sale is CSt sale.