Which part of the declaration of independence acts as an implied plan of action, in that it lists laws and practices to be changed?

The body

Explanation:

There are three blocks in the Constitution: an introduction, called a preamble; the body of the constitution as a whole and also a closure of transitional norms. The body of the constitution is the part that acts as an implicit plan of action, in that it lists laws and practices to be modified.

it foreshadows the theme of the paragraph and hints the topic that will be discussed in the paragraph!