Lexmark 4I3 - Manual (Page 287)

D Last Print Position
For continuous forms:
The minimum distance between the center of the right margin
holes and the end of the last print position used should be 6.4
mm (0.25 in.).
For cut forms:
The minimum distance between the right edge of the form and
the end of the last print position used should be 6.4 mm
(0.25 in.).
Appendix C. Forms Information C-9