Qualification shares refers to the minimum number of shares of commons stock that an individual must own of the company to be a member of the board of directors.
It is not different from common stock, it is a criteria which is mandatory to to be fulfilled by a member of the board of directors.
It shows that the member of the board of directors has a particular amount of interest vested in the company.
Final Answer: Qualification shares are the minimum number of common stock shares that the member of the board of directors of a company must hold.