Answer: colonists could be taxed only by colonial assemblies.
Step-by-step explanation:
“Resolved therefore, That the General Assembly of this colony, together with his majesty or his substitutes have, in their representatives capacity the only exclusive right and power to lay taxes and imposts upon the inhabitants of this colony; and that every attempt to vest such power in any other person or persons whatever than the General Assembly aforesaid is illegal, unconstitutional, and unjust, and has a manifest tendency to destroy British as well as American liberty.”
—Patrick Henry, May 29, 1765