(a) Authority to make; terms and conditions. Every insurance company organized and doing business by virtue of the laws of this state shall have authority, in addition to all other investments authorized by law, to invest assets in real estate acquired for the purpose of leasing the same to any person, firm, or corporation, or in real estate already leased to any person, firm, or corporation, under the following terms and conditions:

(1) That the lessee shall at his own cost erect, or that there has already been erected on such real estate, free of liens, a building or other improvements costing an amount at least equal to the value of the said real estate exclusive of improvements; but, if the lease is entered into simultaneously with the purchase of the real estate, the lessor may agree to erect such improvements on the real estate;

(2) That the said improvements shall remain on the said property during the period of the lease with provisions when such improvements are put upon the said property at the cost of the lessee that at the termination of the lease the ownership of the improvements free of liens shall vest in the owner of the real estate;

(3) That the lessee shall during the term of the lease, or the unexpired period of the lease if the property is bought subject to the lease, pay to the owner of the real estate rent in such amount as will enable the owner to amortize completely the improvements put upon the real estate according to a standard amortization table then in use at or before the end of the normal termination of the lease or at the end of 30 years should the lease, or the unexpired period of the lease, be for a longer period than 30 years; and

(4) That during the term of the lease the tenant shall pay all taxes and assessments levied on or against the said real estate, including improvements, shall keep and maintain the said improvements in good repair, and shall provide and maintain for the benefit of the lessor fire and extended coverage insurance on such improvements at least equal to the then current insurable value of the improvements.

(b) Lease and improvements as prerequisites to treatment as investment. Real estate acquired pursuant to this article shall not be treated as an investment unless and until the improvements required under subsection (a) of this Code section have been constructed and the lease agreement entered into in accordance with the terms of this Code section, but if the lessee is a corporation, the bonds, debentures, notes, or preferred stock of which are eligible as investments under the laws of this state, the requirements of this Code section as to the erection of improvements by the lessee, the cost of the improvements, and the vesting of ownership of the improvements in the owner of the real estate shall not be applicable.

(c) Treatment as admitted asset. Real estate acquired under authority of this Code section shall not be treated as an admitted asset in an amount in excess of the actual investment reduced each year by decrements out of the income from said property sufficient to write off completely, based on standard amortization tables in general use, the improvements at the normal termination of the lease or at the end of 30 years should the term of the lease, or the unexpired period of the lease, be for a longer period than 30 years.

(d) Limitation of amount. The total investment of any company under this Code section shall not exceed 5 percent of its admitted assets. No investment shall be made by any company pursuant to this Code section which will cause the company's investment in all real property owned by it to exceed 25 percent of its admitted assets or when all real property owned by the company equals or exceeds 25 percent of its admitted assets.