Whenever the articles of incorporation or bylaws of a foreign corporation authorized to transact business in the Philippines are amended, such foreign corporation shall, within sixty (60) days after the amendment becomes effective, file with the Commission, and in proper cases, with the appropriate government agency, a duly authenticated copy of the amended articles of incorporation or bylaws, indicating clearly in capital letters or underscoring the change or changes made, duly certified by the authorized official or officials of the country or State of incorporation. Such filing shall not in itself enlarge or alter the purpose or purposes for which such corporation is authorized to transact business in the Philippines.