What is a characteristic feature of expressed powers?

Expressed powers are those that are specifically and clearly outlined in the U.S. Constitution. This clarity provides a strong legal framework for governmental authority, as these powers are granted directly to Congress and the federal government. For instance, powers such as the ability to levy taxes, regulate commerce, and declare war are explicitly stated in the Constitution. This explicitness ensures that there is no ambiguity regarding what powers the government possesses, which is fundamental to the rule of law and accountability in governance.

The other options highlight characteristics that do not apply to expressed powers. For example, expressed powers are not easily changed; any modification would require a formal constitutional amendment process. They also do not need to be inferred, as they are directly stated, distinguishing them from implied powers that must be interpreted or inferred from the Constitution. Lastly, they are not derived from tradition, as those powers would fall under the category of customary or implied powers rather than being explicitly defined in the founding legal document.