In addition to the amounts provided in Section 6447 of said Act, to be paid by the owner in the event he desires to discharge the lien of such bond, the owner shall pay a premium of five percent of the unpaid principal of such bond. The redemption provisions contained in such bond as provided in said Section 6447 of said Act, shall have added thereto the words, "together with a premium of five percent of the unpaid principal."
(Prior code App. A, § 323)