A central organization is the main body of a group of organization

Organization

An organization is a social group which distributes tasks for a collective goal. The word itself is derived from the Greek word organon, itself derived from the better-known word ergon - as we know `organ` - and it means a compartment for a particular job.There are a variety of legal types of...

s.

Also, "central organization" refers to something with an aesthetic center, such as a flower. The aesthetic make-up draws the viewer's eye towards the center.

According to the IRS

Internal Revenue Service

The Internal Revenue Service is the revenue service of the United States federal government. The agency is a bureau of the Department of the Treasury, and is under the immediate direction of the Commissioner of Internal Revenue...

 Publication 557 (Rev. July 2001), Tax-Exempt Status for Your Organization Chapter 1 Page 6, a central organization is an organization that has one or more subordinate organizations

Subordinate organizations

A subordinate organization is one that is under control of the central organization.According to the United States IRS Publication 557 , Tax-Exempt Status for Your Organization this is the definition for a subordinate organization:...

 under its general supervision or control. For example, the American Red Cross

American Red Cross

The American Red Cross , also known as the American National Red Cross, is a volunteer-led, humanitarian organization that provides emergency assistance, disaster relief and education inside the United States. It is the designated U.S...

 is considered a central organization. Its local chapters are subordinate organizations

Subordinate organizations

A subordinate organization is one that is under control of the central organization.According to the United States IRS Publication 557 , Tax-Exempt Status for Your Organization this is the definition for a subordinate organization:...

, since they are independent, but also fall under the control of the main chapter