This act was passed to assert the authority of the British government to tax its subjects in North America after it repealed the much-hated Stamp Act.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 stated that Parliament could pass laws on the American colonies because its authority was the same in America as in Britain.In general the act is descryibed simply as a theoretical gesture or political tactic to ease the passage of the Stamp Act. In general the act is descryibed simply as a theoretical gesture or political tactic to ease the passage of the Stamp Act. Hoping to bring the defiant New England colonies into line, Parliament restricted all trade to and from New England to the British domains. Image 10 of Debates on the Declaratory act and the repeal of the Stamp Act, 1766 568 Docunienls without Parlts. The purpose of the tax was to pay for British military troops stationed in the American colonies after the French and Indian War. Discuss student responses before filling in the blanks on the overhead.