(1) No notice of cancellation of a policy to which section 44-515 applies shall be effective unless mailed by registered mail, certified mail, or first-class mail using intelligent mail barcode or another similar tracking method used or approved by the United States Postal Service to the named insured at least thirty days prior to the effective date of cancellation, except that if cancellation is for nonpayment of premium, at least ten days' notice of cancellation accompanied by the reason therefor shall be given. The requirements of this subsection shall apply to a cancellation initiated by a premium finance company for nonpayment of premium.
(2) Unless the reason accompanies or is included in the notice of cancellation, the notice of cancellation shall state or be accompanied by a statement that upon written request of the named insured, mailed or delivered to the insurer not less than twenty-five days prior to the effective date of cancellation, the insurer will specify the reason for such cancellation. The insurer shall, upon such written request of the named insured, mailed or delivered to the insurer not less than twenty-five days prior to the effective date of cancellation, specify in writing the reason for such cancellation. Such reason shall be mailed or delivered to the named insured within five days after receipt of such request.
(3) For purposes of sections 44-514 to 44-521:
(a) An insurer's substitution of insurance upon renewal which results in substantially equivalent coverage shall not be considered a cancellation of a policy; and
(b) The transfer of a policyholder between insurers within the same insurance group shall be considered a cancellation only if the transfer results in policy coverage or rates substantially less favorable to the insured.
(4) Subsections (1) and (2) of this section shall not apply to nonrenewal.