Decision A113E – Colton Joint Unified School District/Rialto Unified School District/San Bernardino City Unified School District

Employer may not inquire into union's negotiating strategy in order to show illegal agreement by several unions. Proof that unions conspired not to settle with their separate employers until all had reached agreement can be made through evidence of conduct. Absent an affirmative showing of conduct to indicate lack of good faith, there is no basis for compelled testimony about union's negotiating strategy.