Qualification requirements are a prime consideration in determining positions covered by the GS-1146-0 Series. Positions are classifiable to this series when there is a requirement for incumbents to have a practical knowledge of the various marketing elements, functions and/or practices, or a knowledge of the requirements of one or more laws, acts or other statutory provisions relating to the particular program and/or commodity involved. Positions concerned with marketing activities, but which require incumbents to possess other professional or specialized knowledge (., as an economist or botanist) are excluded from this series. Typical services, functions, or other.