UN Colonial Mortal Dictata
From Halopedia, the Halo wiki
The UN Colonial Mortal Dictata is a human piece of legislation or code of ethics which was in effect as of 2549.[1] The precise contents of the Dictata are not known, however it is known to prohibit the flash cloning (or perhaps cloning in general) of full human beings. Dr. Catherine Halsey is known to have violated the code on numerous occasions, most notably when cloning herself in order to create Cortana.
