No domestic life insurance company shall invest or loan its funds in any manner except as provided in §§56-3-301 —56-3-306, except that investments of domestic life insurance companies may include electronic computer or data processing machines or systems heretofore or hereafter 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.