Every person who solicits, collects or expends contributions on behalf of a charitable organization or for a charitable purpose, or who conducts a charitable sales promotion, and every officer, director, trustee or employee of that person who is concerned with the solicitation, collection or expenditure of those contributions shall be considered a fiduciary and as acting in a fiduciary capacity. This section does not supersede or otherwise alter the standard of care or the limitations on the liability of volunteers.