This article is to be construed as power additional and not in derogation of existing laws. Therefore, no law of this state requiring security upon which loans or investments may be made, or prescribing the nature, amount or form of such security, or prescribing or limiting interest rates upon loans or investments, or limiting investments of capital or deposits, or prescribing or limiting the period for which loans or investments may be made, shall be deemed to apply to loans or investments made pursuant to Sections 43-33-301 through 43-33-305.