The term “labor dispute” as used in this chapter has the same meaning as set forth in clauses (i), (ii), and (iii) of paragraph (4) of subdivision (b) of Section 527.3 of the Code of Civil Procedure.
Source:
Section 1138.4, https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?lawCode=LAB§ionNum=1138.4..