The Board of Tax Appeals shall have a seal which shall be in the form of a circle with the image of an eagle in the center and around the margin the words: "Mississippi Board of Tax Appeals," and under the image of the eagle the word: "Official." The seal, in the discretion of the executive director of the board, may be of a raised or engraved design or printed. The Executive Director of the Board of Tax Appeals shall affix the seal prescribed herein to every document where it is required by law, and to every certificate and other official paper executed by him or the board where necessary or proper. All documents authenticated with the seal and signed by the executive director shall be received as evidence in all courts, investigations and proceedings authorized by law, and may be recorded in the same manner and with like effect as a deed. All copies of papers in the office of the board, certified by him and authenticated by the seal, shall be accepted in all matters equally and in like manner as the original.