Form Interrogatories are a list of questions on a court form. For more information about service, see San Diego Law Library's guide entitled Service of Notice and Other Papers.What is the CCP discovery section that states responding parties can not be combined and that discovery need to be to each part. Instructions to All Parties. Best option is to send three sets, make each defendant answer on his or her own. Generally, California law limits parties to 35 special interrogatories and the questions on the Form Interrogatories. Although it is not an absolute requirement, you would be better served if an attorney assists you in preparing the discovery responses. You can send the exact same requests for admissions to different defendants. You will probably receive two different responses. Special interrogatories, like form interrogatories, are questions posed to the other party in the case.