For the purpose of this chapter, the term “employer” includes the association or union designated by Section 10203, and the institution, vendor, credit union, or creditor designated by Sections 10203.5 and 10203.6, and the principal designated by Section 10203.7, and the trustees designated by Section 10202. 8, and the term “employee” includes the members of such union, credit union or association and the debtors of or purchasers from such institution, credit union, vendor or creditor, the agents referred to in Section 10203.7, and the employees and members referred to in Section 10202.8.