The trust instrument by which any business trust was created may be amended in the manner specified therein or in such manner as is valid under the common or statutory law applicable to such business trust; provided, that no such amendment adopted subsequent to the preliminary filings required by section 4 of this chapter shall be legally effective in this state until an executed copy thereof has been filed in the office of the secretary of state accompanied by a fee of thirteen dollars ($13) and a file-marked copy thereof recorded in the office of the county recorder of the county in which the principal office of said business trust in this state is located.
IC 23-5-1-7