To establish Post Offices and post Roads which is one of the many examples of implied power of Congress.
Establishing the banks of the united states ;
An example of an implied power of Congress is the creation of the Internal Revenue Service (IRS) to collect taxes, as inferred from the Sixteenth Amendment. Implied powers are justified by the necessary and proper clause, allowing Congress to enact laws needed to execute its powers. Other examples include establishing a minimum wage and regulating interstate commerce.
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