Domestic insurance companies may invest their assets only as follows: (1) In bonds or other evidences of indebtedness, not in default as to principal or interest, that are valid and legally authorized obligations issued, assumed or guaranteed by the United States or by any state of the United States, by any county, city, town, village, municipality or district in the state, or by any political subdivision of the state, by any civil division or public instrumentality of one (1) or more of the governmental units, if, by statutory or other legal requirements applicable to the entity, the obligations are payable, as to both principal and interest, from taxes levied, or by the law required to be levied, upon all taxable property or all taxable income within the jurisdiction of the governmental unit or from adequate special revenues pledged or otherwise appropriated or by the law required to be provided for the purpose of the payment, but not including any obligations payable solely out of special assessments on properties benefited by local improvements; (2) In interest-bearing bonds, debentures, notes or other evidences of indebtedness, or in commercial paper or bankers' acceptances, or similar evidences of indebtedness customarily issued at a discount from principal value, issued, assumed, or guaranteed by any solvent institution created or existing under the laws of the United States or any state of the United States, that are not in default as to principal or interest; provided, that either: (A) The net earnings of the issuing, assuming or guaranteeing institution available for its fixed charges for a period of five (5) fiscal years next preceding the date of acquisition by the insurance company has averaged per year not less than one and one half (1.5) times its average annual fixed charges applicable to the period, if during either of the last two (2) years of the period the net earnings have been not less than one and one half (1.5) times its fixed charges for the year; or (B) The issuing, assuming or guaranteeing institution's or institutions' long-term obligations are included in the four (4) highest grades by any of the recognized rating agencies; (3) (A) In preferred stock or shares of any solvent institution created or existing under the laws of the United States or of any state of the United States; provided, that: (i) If the stock or shares are cumulative, dividends on the stock or shares are not in arrears, or, if noncumulative, full dividends have been paid in each of the three (3) fiscal years next preceding the date of acquisition by the insurance company; (ii) The aggregate net earnings of the issuing institution available for its fixed charges and dividends for a period of three (3) fiscal years next preceding the date of acquisition is at least equal to one and one fourth (1.25) times the sum of its aggregate fixed charges, full contingent interest and preferred dividend requirements for the same period; and (iii) The investments made under the authority of this subdivision (3) shall not at any time cause the insurance company's holdings: (a) Of the preferred stock or shares of any one (1) institution to exceed three percent (3%) of the admitted assets of the insurance company; or (b) Of the preferred stock or shares of all institutions to exceed twenty-five percent (25%) of the admitted assets of the insurance company; (B) For purposes of determining the holdings of the preferred stock or shares pursuant to subdivision (3)(A), the value of the stock or shares shall be computed at cost or at market on the December 31 preceding, whichever is lower, and, if there is no market on that date, then at cost or book value of that date, whichever is lower; (4) (A) In common stock or shares of any solvent institution created or existing under the laws of the United States or of any state of the United States; provided, that: (i) The institution has earned, during the period of five (5) fiscal years next preceding the date of acquisition by the insurance company, an aggregate sum available for dividends upon its common stock or shares equal at least to an aggregate sum that would have been sufficient to pay dividends of six percent (6%) per annum upon the par or stated value of all its common stock or shares outstanding during the period; (ii) If the stock or shares are in a real estate company, §§ 56-3-405 and 56-3-406 shall apply with respect to the stock or shares and to the real property owned by the real estate company, and the amount invested in the stock or shares of the real estate company shall be included with the aggregate of all of the insurance company's holdings and investments for the purposes of § 56-3-405(6) ; (iii) Investments made under the authority of this subdivision (4) shall not at any time cause the insurance company's holdings: (a) Of common stock or shares of any one (1) institution to exceed five percent (5%) of the admitted assets of the insurance company; or (b) Of common stock of all institutions to exceed either the larger of thirty percent (30%) of the assets of the insurance company or one hundred percent (100%) of the amount by which the capital and surplus of the insurance company exceed the minimum capital and surplus required for the kind of insurance it is authorized to transact in this state; (B) For purposes of determining the holdings of the common stock or shares pursuant to subdivision (4)(A), the value of the stock or shares shall be computed at cost or at market on the December 31 preceding, whichever is lower, and, if there is no market on that date, then at cost or book value on that date, whichever is lower; (5) Upon security of promissory notes amply secured by pledge of any bonds or other securities in which the companies are authorized to invest their funds; (6) Upon security of promissory notes amply secured by pledge of unearned premiums of their own policies; (7) In the obligations, and/or stock where stated, of the following agencies of the government of the United States, whether or not the obligations are guaranteed by the United States government: (A) Commodity credit corporation; (B) Federal intermediate credit banks; (C) Federal land banks; (D) Banks for cooperatives; (E) Federal home loan banks, and stock of such banks; (F) The Federal National Mortgage Association, and stock of the Federal National Mortgage Association when acquired in connection with sale of mortgage loans to the association; and (G) Any other similar agency of the government of the United States and of similar financial quality; (8) In lawfully authorized bonds or other evidences of indebtedness issued or guaranteed by the International Bank for Reconstruction and Development, or the Inter-American Development Bank, the African Development Bank, or the Asian Development Bank; (9) In shares in federally insured building and loan and savings and loan institutions; (10) In other good and solvent securities, in addition to those authorized by this section or other sections of the code, subject to the approval of the commissioner; (11) In loans secured by mortgages upon improved, unencumbered real property, or upon leasehold estates in improved real property in the United States, not exceeding, however, seventy-five percent (75%) of the value of the property or leasehold estate, repayable in not more than thirty (30) years. All loans secured by leasehold estates must provide for amortization of principal at least once in each year in amounts sufficient to completely amortize the loan at least twenty-one (21) years prior to expiration of the lease term, inclusive of the term or terms that may be provided by an enforceable option or options of renewal. Real property and leasehold estates shall not be deemed to be encumbered within the meaning of this section by reason of the existence of unpaid assessments and taxes not delinquent, mineral, oil or timber rights, easements or rights-of-way for public highways, private roads, railroads, telegraph, telephone, electric light and power lines, drains, sewers or other similar easements or rights-of-way, liens for service and maintenance of water rights when not delinquent, party wall agreements, building restrictions, or other restrictive covenants or conditions, or leases under which rents or profits are reserved to the owner, if in any event the security for the loan is a first lien upon the real property or leasehold estate and if there is no condition or right of re-entry or forfeiture under which, in the case of real property other than leaseholds, the lien can be cut off, subordinated or otherwise disturbed, or under which, in the case of leaseholds, the insurance company is unable to continue the lease in force for the duration of the loan. A loan guaranteed or insured in full by the administrator of veterans' affairs pursuant to the Servicemen's Readjustment Act of 1944 ( 38 U.S.C. §§ 3701 -3725 ), may be subject to a prior encumbrance insured by the federal housing administrator or commissioner, and the foregoing limitations in respect to value and repayment shall not apply to a loan that is: (A) Insured by, or for which a commitment to insure has been made by, the federal housing administrator or commissioner pursuant to the National Housing Act ( 12 U.S.C. § 371 et seq.); (B) Guaranteed by the administrator of veterans' affairs pursuant to the Servicemen's Readjustment Act of 1944 ( 38 U.S.C. §§ 3701 -3725 ), except that, if only a portion of a loan is so guaranteed, the limitation of value shall apply to the portion not so guaranteed; or (C) Insured by the administrator pursuant to the Servicemen's Readjustment Act of 1944 ( 38 U.S.C. §§ 3701 -3725 ); (12) In purchase money mortgages or like securities received by the insurance company upon the sale or exchange of real property acquired pursuant to § 56-3-405 ; (13) In bonds, debentures, notes or other evidences of indebtedness of persons or corporations organized under the laws of the United States, or any state of the United States, secured by assignment of lease or leases, or the rentals payable under the leases, of real or personal property or both to the United States, or any state of the United States, or any county, city, town, village, municipality or district in the state or any political subdivision of the county, city, town, village, municipality or district or any civil division or public instrumentality of one (1) or more of the governmental units, or one (1) or more institutions created or existing under the laws of the United States, or of any state; provided, that: (A) The fixed rentals assigned shall be sufficient to repay the indebtedness within the unexpired term of the lease, exclusive of the term that may be provided by an enforceable option of renewal; (B) The lessee has not defaulted in payment of principal of and interest on any of its bonds, notes, debentures, or other evidences of indebtedness during the five (5) fiscal years immediately preceding the date of the investment; (C) The net earnings of each lessee under this subdivision (13) available for its fixed charges for a period of five (5) fiscal years next preceding the date of acquisition by the insurance company has averaged per year not less than one and one half (1.5) times its average annual fixed charges applicable to the period and during either of the last two (2) years of the period the net earnings have been not less than one and one half (1.5) times its fixed charges for the year; and (D) A first lien on the interest of the lessor in the unencumbered property so leased shall be obtained as additional security for the indebtedness; (14) In the purchase and ownership of vessels, vehicles, or rolling stock used or useful for the transportation of persons, goods, products or commodities, or of machinery or equipment used by manufacturing, processing or financial establishments, or of communications equipment used by radio or television stations, or of store fixtures used by retail establishments, which transportation equipment, or machinery or equipment or communications equipment or store fixtures are or will become subject to contracts for the sale or use thereof under which contractual payments are to be made which may reasonably be expected to return the principal of, and provide earnings on, the investment within the anticipated useful life of the property, the anticipated useful life to not be less than five (5) years; (15) In loans or investments in addition to those permitted in other subdivisions of this section or under other sections of the code, notwithstanding any limitations or prohibitions contained in § 56-3-405(a)(5) that might otherwise be applicable; provided, that for the purposes of subdivision (11) and this subdivision (15), the portion of a loan secured by a mortgage upon real property that does not exceed seventy-five percent (75%) of the value of the property shall be deemed to be a permitted investment under subdivision (11) and the remainder of the loan may be deemed to be made under this subdivision (15); and provided, further, for the purposes of § 56-3-405 , that the portion of an investment in a single piece or adjoining pieces of real property acquired or held under the authority of § 56-3-405(5) that does not exceed two percent (2%) of the insurance company's admitted assets shall be deemed to be a permitted investment under § 56-3-404 , and the remainder of the investment shall be deemed to be made under this subdivision (15). Any loan or investment originally made under this subdivision (15) that would subsequently, if it were then being made, qualify as a permitted investment under another subdivision of this section or under another section of the code shall thenceforth be deemed to be a permitted investment under the other subdivision or section. The aggregate of the insurance company's loans and investments under this subdivision (15) shall not exceed five percent (5%) of the company's admitted assets; and (16) In electronic computer or data processing machines or systems purchased for use in connection with the business of the insurer; provided, that the machine or system shall have an original cost of at least fifty thousand dollars ($50,000), and that the amortized value of the machine or system at the end of any calendar year shall not be greater than the original purchase price less ten percent (10%) for each completed year after purchase.