If you are a part-timer, read Article 40 very carefully.
ARTICLE 40. AIR OPERATION
Section 1 - Air Drivers
(a) Air driver work shall consist of delivery and pickup of air packages which, because of time and customer commitments, cannot be reasonably performed by regular package drivers. . .
(9) Movement of air packages to airports and other locations such as service centers, UPS buildings and driver meet points. Shuttle work currently performed by regular full-time drivers shall be excluded. Should a regular full-time driver vacate a position which includes air shuttle work, that job shall either be rebid as it previously existed and continue to be paid at the regular driver rate or the air shuttle work may be combined with other air work to create one (1) or more full-time air or full-time combination job(s) paid in accordance with Section 6 below. In no event shall such shuttle work be assigned to a part-time air driver.
Shuttle work currently being performed by part-time air drivers shall be converted to full-time air driver work when the driver vacates the job except when there is not enough work available to create a full-time job.