((a)) Any Indian who commits against the person or property of another Indian or other person any of the following offenses, namely, murder, manslaughter, kidnapping, maiming, a felony under chapter 109A, incest, a felony assault under section 113, an assault against an individual who has not attained the age of 16 years, felony child abuse or neglect, arson, burglary, robbery, and a felony under within the Indian country, shall be subject to the same law and penalties as all other persons committing any of the above offenses, within the exclusive jurisdiction of the United States.

((b)) Any offense referred to in subsection (a) of this section that is not defined and punished by Federal law in force within the exclusive jurisdiction of the United States shall be defined and punished in accordance with the laws of the State in which such offense was committed as are in force at the time of such offense.