 Dubais port operator DP World has hired a group of banks for a potential issuance of U.S. dollar-denominated sukuk, according to a document seen by Reuters on Monday. It is looking to issue perpetual U.S. dollar-denominated sukuk, or Islamic bonds, non-callable for 5-12 years and will consider issuing, in due course, euro-denominated bonds non-callable for six years. Perpetual bonds are similar to an equity instrument in that they have no maturity date. 