Section 11. For purposes of sections 1 to 10, inclusive of this chapter, the following terms as they may appear in other statutory provisions referred to in this chapter shall have the following meanings:
''Awarding authority'', ''contracting authority'', ''contracting body'', or ''public body'', a public agency.
''General contractor'', ''contractor'', or ''contractor principal'', a construction management at risk firm.
''Subcontractor'', a subcontractor and trade contractor except that the term ''subcontractor'' in subsection (3) of section 39F of chapter 30 shall mean a trade contractor pursuant to subsection (a) and a subcontractor pursuant to subsection (j) of section 8.