Final answer:
The principle of the US Constitution reflected in this excerpt from Liberia's constitution is Supremacy of the constitution.
Step-by-step explanation:
The principle of the US Constitution reflected in this excerpt from Liberia's constitution is Supremacy of the constitution. The excerpt states that the Liberian constitution is the supreme and fundamental law of the country, with binding force and effect on all authorities and individuals. This echoes the principle established in the US Constitution, where the Constitution is considered the highest law of the land that overrides any conflicting laws or authorities.