The Director of the Government Publishing Office shall from time to time print an edition of one thousand copies of the opinions of the Attorney General, which shall be, as to size, quality of paper, printing, and binding, of uniform style and appearance, as nearly as practicable, with volume 8 of opinions, published in the year 1868. Each volume shall contain proper headnotes, a complete and full index, and such footnotes as the Attorney General approves. The volumes shall be distributed in the manner the Attorney General prescribes.