The Task Force, for reasons I can't begin to understand, is housed/administered under the Department of Defense.
Yes, DoD.
The Chair of the new TF will be POTUS.
Vice-Chair: Vance.
7 members of Cabinet and a host of others, all under the authority of the executive branch, are also appointed.
The TF Chair and Vice-Chair "as they deem appropriate" can call on the exec dir of the extant America 250 (Congressional) Commission "to provide recommendations."