To concentrate Federal resources aimed at the prosecution of drug offenses on those offenses that are major.

Major Drug Trafficking Prosecution Act of 2009- Requires the Attorney General's prior written approval for a federal prosecution of an offense under the Controlled Substances Act (CSA) or the Controlled Substances Import and Export Act (CSIEA), or for any conspiracy to commit such an offense, where the offense involves the illegal distribution or possession of a controlled substance in an amount...