Sec. 5 And be it further enacted, That upon the making of any such exchange as is contemplated by this act, it shall and may be lawful for the President to cause such aid and assistance to be furnished to the emigrants as may be necessary and proper to enable them to remove to, and settle in, the country for which they may have exchanged; and also, to give them such aid and assistance as may be necessary for their support and subsistence for the first year after their removal.