There shall be a provision that the policy may be reinstated at any time within two years from the due date of the premium in default unless the cash surrender value has been paid, or the extension period expired, upon the production of evidence of insurability satisfactory to the insurer and the payment of all overdue premiums and payment or reinstatement of any unpaid loans or advances made by the insurer against the policy with interest at a rate not exceeding six percent per annum and payable annually.