42 U.S.C. § 1406b: Expenses of uncompensated advisers serving United States Housing Authority away from home

On and after May 10, 1939, the funds made available for administrative expenses of the United States Housing Authority shall be available for the payment, when specifically authorized by the Administrator, of actual transportation expenses and not to exceed $10 per diem in lieu of subsistence and other expenses to persons serving, while away from their homes, without other compensation from the United States, in an advisory capacity to the Authority.