Service tax invoice

under service tax it will be covered under the definition of original works and will be entited to 60% abatement on entire value.

(1) can be a contractor raised the invoice with VAT (He has VAT registeration )- Yes since material are involved

(2) If he can raised invoice with VAT, it is also applicable to service value- Yes, service tax also needs to be paid as it is a composite contract

(3) can be take vat credit - i am not very sure about this

(4) what will be rule applicable to service value- if covered under original work contract, service tax shall be payable on 40% of the value,