Note that the Scout Badge is NOT considered a "Rank" by BSA.  
The Charter and Bylaws in Article X, Section 1, Clause 6, states:

"Ranks. There shall be the following ranks in Boy Scouting: Tenderfoot, Second Class,
First Class, Star, Life, and Eagle. The requirements shall be those authorized by the
Executive Board and set forth in official Scouting publications. Eagle Palms may also be
awarded on the basis of requirements authorized by the Executive Board and set forth in
official Scouting publications."

1.  Meet Age Requirements.
Meet age requirements. Be a boy who is 11 years old, or one who has
completed the fifth grade or earned the Arrow of Light Award and is at least
10 years old, but is not yet 18 years old.

2.  Complete a Boy Scout application and health history signed by your parent
or guardian.

3.  Find a Scout Troop Near Your Home.

4.  Repeat the Pledge of Allegiance.

5.  Demonstrate the Scout Sign, Salute, and handshake.

6.  Demonstrate tying the square knot (a joining knot).

7.  Understand and agree to live by the Scout Oath or Promise, Law, Motto,
and Slogan, and the Outdoor Code.

8.  Describe the Scout badge.

9.  Complete the Pamphlet Exercises.

With your parent or Guardian, complete the exercises in the pamphlet
"How to
Protect Your Children from Child Abuse: A Parent's Guide."

10.  Participate in a Scoutmaster Conference.
Turn in your Boy Scout application and health history form signed by your
parent or guardian, then participate in a Scoutmaster conference.
Scout Badge
Boy Scout Joining Requirements