The act was a response to the Boston Tea Party. King
George III's speech of March 7, 1774 charged the colonists with attempting to injure British commerce and subvert the constitution. On March 18,
Lord North brought in the Port Bill, which outlawed the use of the
Port of Boston (by setting up a barricade/blockade) for "landing and discharging, loading or shipping, of goods, wares, and merchandise" until restitution was made to the King's treasury (for
customs duty lost) and to the
East India Company for damages suffered. In other words, it closed Boston Port to all ships, no matter what business the ship had. It also provided that
Massachusetts Colony's seat of government should be moved to
Salem and
Marblehead made a port of entry. The Act was to take effect on June 1. ==Passage==