in 200 words summarize the case Health Services and Support - Facilities Subsector Bargaining Association v. BC, [2007] 2 S.C.R. 391.

A. Who was involved in the case? (case name and citation)

B. What happened in the case? (facts)

C. Which courts have heard the case already? (procedural history)

D. What are the legal issues the court must decide? (issues)

E. How did the judge(s) decide the case? (decision)

F. What legal principle does this decision stand for? (the ratio)

G. What is the explanation the court gave for its decision? (reasons)