The Boy Scouts of America and the American Radio Relay League, ARRL, have worked together since establishing the Wireless Merit Badge in 1918, now called the Radio Merit Badge. They've also worked together on formal recognition for Scouting leaders involved in amateur radio and Scouting as well as signing a formal memorandum of understanding.
Amateur Radio Service to Scouting Award
The ARRL Amateur Radio Service to Scouting Award was officially recognized by the Boy Scouts of America in 2014. The award recognizes actively involved Scouting leaders who make a significant contribution to providing Scouts with a memorable and valuable Amateur Radio experience. The BSA allows Scouting leaders to wear the Community Organization Award square knot on their uniform, in recognition of their service within their community organization.
Memorandum of Understanding
In February 2011 the BSA and the ARRL signed a memorandum of understanding to formally outline their respective roles in this ongoing relationship for the benefit of Scouting, amateur radio, and the youth of the nation.
Here are links to the document, the press release, and the video of the formal signing.