l_blue_book_heading: 150, 420, 400
| bb_heading | bb_chapter | bb_division | description |
|---|---|---|---|
| 150 | 420 FACTORS RELEVANT TO DETERMINATION OF SCOPE OR COMPOSITION OF UNIT 420 | 400 BARGAINING UNITS 400 | PRESUMPTION OF APPROPRIATENESS OF 9(b) UNITS |
| bb_heading | bb_chapter | bb_division | description |
|---|---|---|---|
| 150 | 420 FACTORS RELEVANT TO DETERMINATION OF SCOPE OR COMPOSITION OF UNIT 420 | 400 BARGAINING UNITS 400 | PRESUMPTION OF APPROPRIATENESS OF 9(b) UNITS |