In reading that article, I doubt that applies to someone working part of a scheduled
vacation, but probably if you are coming back after an absence of some sort.
ie: workers comp, short-term disability, call-off, sick days.... etc.
The reason being, is because of their vacation language;
"In lieu of time off, employees, at their discretion, may take the pay for said weeks. However, the employee must notify the Employer during September of each year of this request."
https://teamster.org/sites/default/files/ups18southernsupp.pdf
There is no provision that allows them to break it up into single days or the
ability do it "on the fly" like the Central Region language.