Alleged violations of these rules and regulations are heard, and the penalties prescribed herein are imposed, either in a federal district court or by a federal magistrate in accordance with applicable court rules. Individuals found guilty of violating these rules and regulations while on property under the charge and control of the Postal Service are subject to a fine as provided in 18 U.S.C. 3571 or imprisonment of not more than 30 days, or both. Nothing contained in these rules and regulations shall be construed to abrogate any other federal laws or regulations or any state or local laws and regulations applicable to any area in which the property is situated.