It shall be the duty of the Township Secretary or someone authorized and directed by him or her to keep up-to-date the certified copies of the book containing the Code required to be filed in the office of the Township Secretary for the use of the public. All changes in said Code and all legislation adopted by the Board of Commissioners subsequent to the effective date of this codification which the Board of Commissioners shall adopt specifically as part of the Code shall, when finally adopted, be included therein by reference until such changes or new legislation are printed as supplements to said Code books, at which time such supplements shall be inserted therein.