Original: Since Green Lantern: Rebirth and the restart of the Green Lantern Corps, the only oath used has been the Brightest Day, Blackest Night version.
Simplified: Hal Jordan was eventually revived and once again became a Green Lantern. He also made an oath to recharge the power ring: "In brightest day, in blackest night No evil shall escape my sight, Let those who worship evil's might, Beware my power... Green lantern's light!"