A party may combine form interrogatories with other interrogatories, subject to applicable limitations as to number. A party shall avoid propounding a form.A party may direct written interrogatories to any other party. A copy of the interrogatories shall be served on all other parties entitled to notice. Sec. 1. Instructions to All Parties. How to fill out the Form Interrogatories for Employment Law Cases? Is a leading Chicago law firm available for litigation and trials of all types. Constitutional Rights Foundation Chicago (CRFC) and Public Interest Law Initiative (PILI). All forms below with a "fillable icon" are documents that you can open "on-line", fill in the appropriate fields and then print on your printer. Defendant. ) PLAINTIFF'S FIRST SET OF INTERROGATORIES AND.