(b) This chapter does not apply to the following when engaged in the regular course of their respective businesses:
- (1) attorneys at law;
- (2) persons regularly employed on a regular wage or salary in the capacity of credit men or a similar capacity, except as an independent contractor;
- (3) banks, including trust departments of banks, fiduciaries and financing and lending institutions;
- (4) common carriers;
- (5) title insurers and abstract companies while doing an escrow business;
- (6) licensed real estate brokers;
- (7) employees of licensees under this chapter;
- (8) substation payment offices employed by or serving as independent contractors for public utilities.