BS Reporter / Mumbai October 03, 2008, 0:49 IST The referendum in 22 villages that are part of the Mumbai Special Economic Zone (SEZ) in Raigad district was a unique event; it will not be repeated in the case of any other industrial, infrastructure or SEZ project, according to Maharashtra Chief Minister Vilasrao Deshmukh. He was speaking at the Press conference called to give details on investment he managed to bring in from his weeklong Europe tour, which concluded on Wednesday. There was a need to take a referendum in these villages because of changes in SEZ policy; after the land got notified for acquisition, the central government came out with guidelines of no