Participation by manufacturers is preferred. However, agents/dealers participating on behalf of a manufacturer shall submit a Tender Specific Authorization (TSA) issued by the Principal/OEM along with their offer, failing which the offer shall be summarily rejected. In a particular tender, either the Principal/OEM or its authorized agent/dealer may participate for the same item, but not both simultaneously. Further, a Principal/OEM shall not issue a Tender Specific Authorization to more than one authorized agent/dealer for the same item in the same tender, and any such offers shall be summarily rejected. An authorized agent/dealer submitting a bid on behalf of one Principal/OEM shall not submit a bid on behalf of another Principal/OEM for the same item in the same tender, and such bids shall also be summarily rejected. The trader/authorized dealer shall clearly indicate in the bid the name of the manufacturer, make, and complete address of the manufacturing works to facilitate inspection of the material at the OEM's premises.