(a) As used in this chapter:
(1) “Board” means the Industrial Accident Board.
(2) “Department” means the Department of Labor.
(3) “Employer” includes any person, excepting those provided for in subsection (b) of this section, acting directly or indirectly in the interest of any employer in relation to any employee but shall not include the United States or the State or any political subdivision thereof.
(4) “Person” means an individual, partnership, association, corporation, statutory trust, business trust, legal representative or any organized group of persons.
(5) “Secretary” or “Secretary of Labor” shall mean the Secretary of Labor or the Secretary's authorized designee, provided, that any such delegation of authority is consistent with Chapter 85 of Title 29.
(b) Persons in the following occupations, and employers of persons engaged in these occupations to the extent thereof, shall not be within the scope of this chapter and are specifically excepted from all the provisions of this chapter: