In making rules, the commission shall act in the interests of promoting and maintaining a sound banking system; securing deposits, depositors and other customers; preserving the liquid position of banks; promoting the competitive equality of state - chartered banks with national banks and other financial institutions in all aspects of banking practices and permitted nonbanking activities; and preventing injurious credit expansions and contractions. Source: SL 1969, ch 11 , § 2.29; SL 1981, ch 346 , § 19; SDCL, § 51-16-39; SL 1988, ch 377 , § 52; SDCL, § 51-16-14.2.