(2) Parties to Conspiracy. If a person knows or could expect that one with whom he agrees has agreed or will agree with another to effect the same objective, he shall be deemed to have agreed with the other, whether or not he knows the other's identity.
(3) Duration of Conspiracy. A conspiracy shall be deemed to continue until its objectives are accomplished, frustrated or abandoned. "Objectives" includes escape from the scene of the crime, distribution of booty, and measures, other than silence, for concealing the crime or obstructing justice in relation to it. A conspiracy shall be deemed to have been abandoned if no overt act to effect its objectives has been committed by any conspirator during the applicable period of limitations.
(4) Defense Precluded. It is no defense to a prosecution under this section that the person with whom such person is alleged to have conspired has been acquitted, has not been prosecuted or convicted, has been convicted of a different offense, is immune from prosecution, or is otherwise not subject to justice.
(5) Liability as Accomplice. Accomplice liability for offenses committed in furtherance of the conspiracy is to be determined as provided in section 401.
(6) Grading. Conspiracy shall be subject to the penalties provided for attempt in section 1001(3).
(7) Jurisdiction. There is federal jurisdiction over an offense defined in this section as prescribed in section 203.