| Labor Code | Description |
| 01 | Regular (Straight Time) |
| 02 | Overtime paid at straight time |
| 03 | Overtime paid at time and one half-Scheduled |
| 04 | Overtime paid at double time |
| 05 | Overtime paid at time and one half-Unscheduled |
| 06 | OBS Holyday |
| 07 | T&E Extraboard Daily Guarantee |
| 08 | Layover Guarantee OBS |
| 09 | Daily Guarantee |
| 10 | Vacation |
| 11 | Sick |
| 12 | Sick (RUIA) |
| 13 | Sick (Creditable) |
| 14 | Holiday |
| 15 | Personal Holiday |
| 16 | Guarantiee (OBS Union employees only) |
| 17 | Compassionate Leave |
| 18 | Jury Duty |
| 19 | Military Leave |
| 20 | OTE-Extraboard Daily Guarantee |
| 21 | Compensated Earned Vacation |
| 22 | Travel Time |
| 23 | Union Retro (reg.Time) |
| 24 | Union Retro (Overtime) |
| 25 | Advance Vacation Payment |
| 26 | Down Time Rest OBS |
| 27 | Foul Weather (not Paid) |
| 28 | Compensatory Time Earned |
| 29 | Misc. Paid Absence |
| 30 | Overtime paid at straight time for time not worked |
| 31 | Overtime paid at time and one half for time not worked |
| 32 | Emergency Compensatory Time Paid (2 limit per year) |
| 33 | Family Leave - Unpaid |
| 34 | Travel Time - Unpaid |
| 35 | Daily Guarantee / Over Time |
| 36 | Compensatory Time Paid |
| 37 | Personal Leave |
| 38 | Paid Rest Overtime |
| 39 | Diff PC & FC |
| 40 | Crew Meals |
| 41 | Travel |
| 42 | Arbitrary Payment |
| 43 | Mgmt. Retro Pay |
| 44 | Jury Duty Exemption Paid |
| 45 | TCS/OBS Uniform Payment |
| 46 | Tips |
| 47 | Longevity |
| 48 | Differential |
| 49 | Miscellaneous/Make Whole |
| 50 | Time Claims (dollars) |
| 51 | Guarantees C-1 |
| 52 | Guarantees C-2 |
| 53 | Emergency Work-Appr. Engineer |
| 54 | Guarantee Reduction |
| 55 | Separation C-2 |
| 56 | Time Claims (Hrs & dollars) |
| 57 | Vacation Payment - MLR |
| 58 | Sick Payment -MLR |
| 59 | Resigned/Quit (Unpaid) |
| 60 | Sick Unpaid |
| 61 | Unexcused Absence (Unpaid) |
| 62 | Excused Absence (Unpaid) |
| 63 | On-Job Injury (Unpaid) |
| 64 | 7-Day Bump (Unpaid) |
| 65 | Unassigned/Rest Days (Unpaid) |
| 66 | Suspension (Unpaid) |
| 67 | Late Arrival (Unpaid) |
| 68 | Early Departure (Unpaid) |
| 69 | Remarks/Claims (Formerly Personal Leave) (Unpaid) |
| 70 | Overtime Refused |
| 71 | Regular Time Refused |
| 72 | Guarantee Suspended (Unpaid) |
| 73 | Special Allowance MBTA |
| 74 | Layover MBTA T&E |
| 75 | Layover |
| 76 | Layover Over Time |
| 77 | Deadhead Combine |
| 78 | Deadhead Combine Over Time |
| 79 | Deadhead Separate |
| 80 | Starting Time at Over Time |
| 81 | Miscall |
| 82 | Annulment |
| 83 | Calls |
| 84 | Trip Guarantee |
| 85 | Extra Board Guarantee |
| 86 | Short Consist |
| 87 | Productivity Allowance |
| 88 | Calls Over Time (Minimum 2 Hrs.) |
| 89 | Help Time |
| 90 | Training/Exams |
| 91 | Qualifying |
| 92 | Court/Inquest |
| 93 | Trials |
| 94 | Conference |
| 95 | Meeting/Assignment |
| 96 | Lodging Allowance |
| 97 | Relief Day Work (Over Time) |
| 98 | Emergency Work-Calls (Over Time) |
| 99 | Denials |