Every corporation, which on March 10, 1917, was actually and publicly engaged in banking or trust business in this state in full compliance with the laws hereof, which were in force immediately prior to March 10, 1917, may, if it otherwise complies with the provisions of this title, continue its said business, subject to the terms and regulations hereof and without amending its articles of incorporation, although its name and the amount of its capital stock, the number or length of terms of its directors or the form of its articles of incorporation do not comply with the requirements of this title: PROVIDED,
RCW 30A.04.220