The Preamble to the Declaration might be where one can see "the declaration" of The Declaration of Independence. In the opening statement of the document, Jefferson makes the argument that the political and economic rights sought by the Colonists is actually a statement of a human condition that pleads for freedom and for change from the status quo. The Preamble invokes the notion of "human rights" or "inalienable rights" as the basis for colonial freedom. This helps to make the specific condition of the colonists a universal predicament with which nearly anyone can identify. In the end, it is this section which begins the process of declaring the need for independence. The following section, most evident in the listing of grievances, details the specific acts for which the King and Parliament must bear responsibility, furthering the case for declaring independence.
When you say "declaration section," I assume that you are talking about the Preamble -- the part that begins "We hold these truths..."
What this section is declaring if the colonists philosophical justification for declaring independence. The section makes the following major points:
- People are given the rights to life, liberty, and the pursuit of happiness by their creator.
- Governments are formed by the consent of the people.
- The purpose of the government is to protect the rights mentioned in the first point.
- When the government fails to fulfill this purpose, it is the right and the duty of the people to rebel.
If you are talking about the final section of the Declaration, all it is saying is that the colonies now declare themselves to be free and independent. They are no longer part of Britain and have the right to do all the things that independent countries can do (like waging war).
The main or operative part of declaration of independence, as the name implies is, the assertion by the 13 colonies in North America of their independence from the British rule or dominance. This declaration comes at the end of the document called Declaration of Independence, after justification for such an actions are given in the earlier part.
The exact text of this declaration is given below.
We, therefore, the Representatives of the united States of America, in General Congress, Assembled, appealing to the Supreme Judge of the world for the rectitude of our intentions, do, in the Name, and by Authority of the good People of these Colonies, solemnly publish and declare, That these united Colonies are, and of Right ought to be Free and Independent States, that they are Absolved from all Allegiance to the British Crown, and that all political connection between them and the State of Great Britain, is and ought to be totally dissolved; and that as Free and Independent States, they have full Power to levy War, conclude Peace, contract Alliances, establish Commerce, and to do all other Acts and Things which Independent States may of right do. — And for the support of this Declaration, with a firm reliance on the protection of Divine Providence, we mutually pledge to each other our Lives, our Fortunes, and our sacred Honor.
A full text of declaration of independence is available at the web site referred below.