In the 1790s, despite a lack of specific constitutional authority to do so, Congress chartered a national bank, arguing that the institution was necessary to regulate the value of currency, a power that the Constitution did grant to Congress. The chartering of a national bank was therefore an example of

An implied power.

Explanation:

In the 1790s, despite a lack of specific constitutional authority to do so, Congress chartered a national bank, arguing that the institution was necessary to regulate the value of currency, a power that the Constitution did grant to Congress. The chartering of a national bank was therefore an example of an implied power.

By definition, an implied power refers to the unconstitutional political powers being granted to the government of the United States of America. This simply means that, they're political powers which aren’t stated explicitly in the US Constitution but are granted based on the precedence of similar powers in writing.

Alexander Hamilton an economist who was the secretary of the treasury stated in 1791, that in spite of the fact that the federal government is granted explicit powers through the US Constitution, he was of the opinion that the government requires an implied power so as to function properly.

Hence, an implied power isn't explicitly stated in the Constitution but is inferred because it is necessary for the government to play its role effectively and properly.

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your mothers brothers brother in law would be your father.