Despite the protection offered under the U.S. Treaty, some businesses are still prohibited. These are communications, transport, fiduciary functions, banking involving depository functions, exploitation of benefits from land or other natural resources, and domestic trade in indigenous agricultural products. It should be noted that the U.S. Treaty actually expired in December 2005. However, there has been an extension for the submission of applications, for an unspecified period of time. Many U.S. investors have applied for protection under the U.S. Treaty during this period of extension.