The principles of the 4th Amendment were codified in British Liberty charters beginning with the Magna Carta of 1215. Systematically developed and further solidified for over 500 years. The abuse by British agents came to a head in the American Colonies. Navigation Act of 1760 mandated that the American colonists purchase only certain goods approved by the British government and supplied by British ships. Parliament began assessing consumption taxes on these mandated purchases.