[§392-50]  Cancellation of insurancecontracts.  No policy or contract of insurance issued by a stock company ormutual association against liability arising under this chapter shall becanceled within the time limited in the contract for its expiration until atleast ten days after notice of intention to cancel such contract, on a datespecified in the notice, has been filed with and served on the director oflabor and industrial relations and the employer. [L 1969, c 148, pt of §1]