Datalines cannot be split over multiple lines, as each line represents an input data record. So it makes no sense to include them in the line length limit.

There are multiple 'flavours' of datalines. Each will begin / end with a line that begins with the markers below
| section begin |
section end |
datalines; |
; |
datalines4; |
;;;; |
cards; |
; |
cards4; |
;;;; |
parmcards; |
; |
parmcards4; |
;;;; |