Liability to pay state tax arises when possession or right in constructed property is transferred to the development-rights supplier. Notification designates (a) suppliers of development rights taken in consideration partly or wholly as construction services and (b) suppliers of construction services taken in consideration partly or wholly as development rights; in both cases the liability to pay state tax on such service supplies arises when the developer or builder transfers possession of, or the right in, the constructed complex, building or civil structure to the person supplying development rights by entering into a conveyance deed or similar instrument.