The quote is taken from
this post.
I agree that this is not an organization that exists in any handbook. At the ward level, the "committee" that "steers" the Young Men is the Young Men Presidency (see HB 2,
8.3.4) under the direction of the bishopric (see HB 2,
8.3.1).
At the stake level, the stake presidency and high councilors oversee the Young Men (see HB 2,
8.15). The only committee mentioned at the stake level is the Stake Aaronic Priesthood–Young Women Committee (see HB 2,
8.15.5).
Questions that can benefit the larger community should be asked in a public forum, not a private message.