Final answer:
The restriction mentioned is an example of the federalist system because it limits the power of Congress and protects the liberties of citizens.
Step-by-step explanation:
The restriction mentioned is an example of the federalist system because federalism involves power-sharing between the central government and state or local governing bodies. The restriction limits the power of Congress in certain ways, such as prohibiting the passage of bills of attainder and ex post facto laws, and limiting the ability to suspend the writ of habeas corpus. These restrictions are in place to protect the liberties of citizens and prevent the central government from becoming too powerful, which aligns with the principles of federalism.