Final answer:
The informal amendment of the U.S. Constitution can occur through legislation passed by Congress and significant national policy changes that necessitate multiple approaches and joint agreement between the national and state governments.
Step-by-step explanation:
There are several ways the U.S. Constitution may be informally amended. Two such methods include:
- Legislation: Congress can pass laws that clarify and interpret provisions of the Constitution, thereby amending it informally. This includes creating laws that expand constitutional rights or further define expressed powers.
- National policy changes: Policy revisions which involve multiple approaches can also result in informal amendment of the Constitution. This typically requires joint agreement between national and state governments.
These processes illustrate the dynamic nature of constitutional law and how it can adapt to the changing needs and conditions of society without formal amendment.