Marihuana Cultivation on Federal Lands Crime Act of 1983 - Amends the Federal criminal code to make it unlawful for any person to knowingly plant, grow, or cultivate marihuana on Federal land unless authorized by Federal law. Provides a sentence of not less than one year and not more than fifteen years, and a fine of not less than $10,000 and not more than $15,000,000 for a first offense. Provides additional penalties for subsequent offenses.