How long did the Boston Port Act last?

The Boston Port Act, enacted in 1774 as part of the Intolerable Acts, lasted until March 1776. It was designed to punish the city of Boston for the Boston Tea Party by closing its port to all trade until the East India Company was compensated for the tea that was destroyed. The act remained in effect until the British government lifted the blockade following the growing tensions and eventual outbreak of the American Revolutionary War.