British King George III approved the repeal of the Stamp Act and passed the Declaratory Act on March 18, 1766. This act was passed to assert the authority of the British government to tax its subjects in North America after it repealed the much-hated Stamp Act.The Declaratory Act passed in 1766 added to colonial unrest because many colonists believed that C. Parliament intended to implement more unfair taxes. The Declaratory Act (1766) to the Coercive Acts (1774). On March 22, 1765, Parliament passed the Stamp Act. This act stated that the taxing authority of the British Parliament in America was as same as in Britain. The first official action against the Stamp Act came from the Virginia House of Burgesses on May 29th, 1765. That was enough to take the air out of the opposition. On March 18, 1766, George III approved Parliament's repeal of the Stamp Act and its passage of the Declaratory Act. The statement is true.