The following rules shall be observed with respect to the settlement of wages:
_First._ Upon the completion, before a shipping-commissioner, of any discharge and settlement, the master or owner and each seaman, respectively, in the presence of the shipping-commissioner, shall sign a mutual release of all claims for wages in respect of the past voyage or engagement, and the shipping-commissioner shall also sign and attest it, and shall retain it in a book to be kept for that purpose, provided both the master and seaman assent to such settlement, or the settlement has been adjusted by the shipping-commissioner.
_Second._ Such release, so signed and attested, shall operate as a mutual discharge and settlement of all demands for wages between the parties thereto, on account of wages, in respect to the past voyage or engagement.
_Third._ A copy of such release, certified under the hand and seal of such shipping-commissioner to be a true copy, shall be given by him to any party thereto requiring the same, and such copy shall be receivable in evidence upon any future question touching such claims, and shall have all the effect of the original of which it purports to be a copy.
_Fourth._ In cases in which discharge and settlement before a shipping-commissioner are required, no payment, receipt, settlement, or discharge otherwise made shall operate as evidence of the release or satisfaction of any claim.
_Fifth._ Upon payment being made by a master before a shipping-commissioner, the shipping-commissioner shall, if required, sign and give to such master a statement of the whole amount so paid; and such statement shall, between the master and his employer, be received as evidence that he has made the payments therein mentioned. (R. S., 4552.)
Upon every discharge effected before a shipping-commissioner, the master shall make and sign, in the form given in the table marked "B," in the schedule annexed to this Title [R. S., 4501-4613], a report of the conduct, character, and qualifications of the persons discharged; or may state in such form, that he declines to give any opinion upon such particulars, or upon any of them; and the commissioner shall keep a register of the same, and shall, if desired so to do by any seaman, give to him or indorse on his certificate of discharge a copy of so much of such report as concerns him. (R. S., 4553.)