Criminal Code Improvement Act of 2015

Criminal Code Improvement Act of 2015 This bill amends the federal criminal code to establish a default mens rea standard (i.e., a state of mind requirement) for a federal criminal offense whose defining statute does not specify a required state of mind. A conviction for such federal criminal offense requires proof that a defendant acted knowingly. Additionally, if the offense consists of conduct that a reasonable person would not know or have reason to believe was unlawful, then a conviction requires proof that the defendant knew or had reason to believe such conduct was unlawful. Finally, the bill amends the federal judicial code to require the Department of Justice to develop and update, index, and publish an inventory of all federal criminal offenses, including violations of agency rules or regulations that constitute or define federal criminal offenses.