Under Massachusetts' mandatory life provisions c. 175 §132, after how long does a life insurance policy generally become incontestable except for non-payment of premium?

Why this is the answer

M.G.L. c. 175 §132 requires every MA life policy to become incontestable after 2 years in force during the insured's lifetime, except for non-payment of premium. After that window, the insurer cannot rescind for material misrepresentation.