Section 4
And be it further enacted, That the commissioners above named shall have concurrent jurisdiction with the judges of the Circuit and District Courts of the United States, in their respective circuits and districts within the several States, and the judges of the Superior Courts of the Territories, severally and collectively, in term-time and vacation; shall grant certificates to such claimants, upon satisfactory proof being made, with authority to take and remove such fugitives from service or labor, under the restrictions herein contained, to the State or Territory from which such persons may have escaped or fled.