When used in this subchapter, unless the context otherwise requires:
(1) “Employer” includes every person, firm, corporation, partnership, stock association, agent, manager, representative, foreman, or other person having control or custody of any employment, place of employment, or of any employee.
(2) However, this subchapter shall not affect any employer engaged exclusively in farming operations, nor shall it affect employers employing fewer than five (5) persons; and
(3) “Safe” or “safety” as applied to any employment or place of employment shall include conditions and methods of sanitation and hygiene reasonably necessary for the protection of the life, health, safety, and welfare of employees or the public.