Section 5. An existing corporation organized under chapter 156A or chapter 156D may elect to become a benefit corporation by amending its articles of organization to include a statement that the corporation is a benefit corporation. In order to be effective, the amendment shall be adopted by at least the minimum status vote. Such amendment shall be treated as an amendment of the articles under clause (4) of subsection (a) of section 13.02 of said chapter 156D and the shareholders of the corporation shall be entitled to appraisal rights under sections 13.01 to 13. 31, inclusive, of said chapter 156D.