The deal was reached in principle in March 2009, according to the undated memorandum, which lays out the ground rules for the intelligence sharing.The five-page memorandum, termed an agreement between the US and Israeli intelligence agencies "pertaining to the protection of US persons", repeatedly stresses the constitutional rights of Americans to privacy and the need for Israeli intelligence staff to respect these rights.But this is undermined by the disclosure that Israel is allowed to receive "raw Sigint" – signal intelligence. The memorandum says: "Raw Sigint includes, but is not limited to, unevaluated and unminimized transcripts, gists, facsimiles, telex, voice and Digital Network Intelligence metadata and content."According to the agreement, the intelligence being shared would not be filtered in advance by NSA analysts to remove US communications. "NSA routinely sends ISNU [the Israeli Sigint National Unit] minimized and unminimized raw collection"