of Oa is now restored. The Forbidden Chapter of the Book tells the prophecy of the Blackest Night, the final destruction of the Green Lantern Corps at the hands of their greatest enemies as it was told to Abin Sur by the demons of Ysmault. Upon recruitment, a Green Lantern is expected to uphold certain principles of their duty. These principles include: The protection of life and liberty within the assigned sector. Following the orders of the Guardians without question. Noninterference with a planet's culture, political structure, or its population's collective will. Acting within local laws and obeying local authority within reason (presumably, the Guardians' orders can overrule this when necessary). Taking no action against anyone or anything until they are proven to be a threat against life and liberty. Avoiding the use of equipment, resources or authority of the Corps for personal gain. Showing respect for and cooperating with other members of the Corps and the Guardians. Showing respect for life which includes restraint of force unless there is no reasonable alternative. Giving top priority to the greatest danger in the assigned sector. Upholding the honor of the Corps. The book of Oa has been designated off-limits after being rewritten by the Guardians of the Universe to include ten new laws. Only the first four have been revealed: Lethal force is authorized against the Sinestro Corps. Lethal force is authorized against all enemies of the Green Lantern Corps. This law was later repealed by Corps leader John Stewart during the war against the Darkstars, believing that the Green Lanterns are more than about winning battles, and need to focus on winning the love and support of the universe around them to prove their way of standing up for Justice is better than the Darkstars way of executing known criminals. Physical relationships and love between Green Lanterns is forbidden within the Corps. This law is later repealed and relationships between Green Lanterns are allowed following the Blackest Night event. The Vega System is no longer outside of Green Lantern Corps' jurisdiction. When the new laws are written, the book is revealed to be written in Interlac, the galactic universal language used by the 30th and 31st Century United Planets and Legion of Super-Heroes. To enforce these principles, the Guardians closely monitor the activities of the Lanterns. If they feel a violation of Corps regulations occurred, they will summon the offender