This report describes a framework constructed to assist in understanding the long run impacts of regulations proposed by the US Coast Guard on domestic marine ports. The port impacts considered pertain to cost, time and reliability. These three factors have a direct bearing on demand for port services and should therefore be considered as part of an assessment of the consequences of proposed regulations. The role of ports in the global supply chain is significant and rapidly evolving. Actions taken through regulations that affect demand for port services have direct implications for international trade and, consequently, the nation's economic well-being. These relationships are the subject of this report. As such, it forms part of an effort by the USCG Office of Standards Evaluation and Development to enhance the process of performing regulatory evaluations, as required by the White House Office of Management and Budget (OMB).