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Rule 3.1000.Format of supplemental and further discovery

Division 10. Discovery · Chapter 1. Format of Discovery · Last amended 2007 · Last verified July 29, 2026

In one sentenceRule 3.1000 requires every set of supplemental or further discovery, interrogatories, responses, amended answers, inspection demands, and admission requests, to open with a caption identifying the parties and set number, and requires each response to track its corresponding request by matching number or letter without repeating the request's text.

Full Text of Rule 3.1000

Text sizeJump to: (a) (b)

(a) Supplemental interrogatories and responses, etc. In each set of supplemental interrogatories, supplemental responses to interrogatories, amended answers to interrogatories, and further responses to interrogatories, inspection demands, and admission requests, the following must appear in the first paragraph immediately below the title of the case:
(1) The identity of the propounding, demanding, or requesting party;
(2) The identity of the responding party;
(3) The set number being propounded or responded to; and
(4) The nature of the paper. (Subd (a) amended effective January 1, 2007; previously amended effective January 1, 1986, and July 1, 1987.)
(b) Identification of responses Each supplemental or further response and each amended answer must be identified by the same number or letter and be in the same sequence as the corresponding interrogatory, inspection demand, or admission request, but the text of the interrogatory, demand, or request need not be repeated. (Subd (b) amended effective January 1, 2007; previously amended effective January 1, 1986, and July 1, 1987.)

Plain-English Summary

Rule 3.1000 opens Division 10's discovery rules with a purely formatting requirement, fixing how a growing stack of supplemental and further discovery paperwork has to look before getting into what any of it says. Every set of supplemental interrogatories, supplemental responses, amended answers to interrogatories, and further responses to interrogatories, inspection demands, or admission requests has to carry, in the first paragraph right below the case title, four pieces of information: who is propounding, demanding, or requesting; who is responding; which numbered set this is; and what kind of document it is. A case can generate several rounds of discovery over its life, and this caption lets anyone picking up the document know at a glance where it fits.

The second requirement keeps those rounds legible against each other. Each supplemental or further response, and each amended answer, has to carry the same number or letter and appear in the same order as the interrogatory, inspection demand, or admission request it answers. What it does not have to do is repeat the text of that original request, which keeps the documents shorter while still letting a reader line up a response against the request it responds to without hunting through separate documents.

Frequently Asked Questions

What has to appear in the first paragraph of a supplemental or further discovery document?

The identity of the propounding, demanding, or requesting party; the identity of the responding party; the set number; and the nature of the document.

Does a further response have to repeat the text of the original interrogatory or request?

No. It only has to be identified by the same number or letter and appear in the same sequence.

Does Rule 3.1000 apply to inspection demands and requests for admission, or only to interrogatories?

It applies to further responses to interrogatories, inspection demands, and admission requests, and separately to supplemental interrogatories, supplemental responses, and amended answers.

Amendment History

Rule 3.1000 amended and renumbered effective January 1, 2007; adopted as rule 331 effective January 1, 1984; previously amended effective January 1, 1986, and January 1, 1987.

Source & verification. Rule text is reproduced verbatim from the Judicial Council of California. Adopted by the Judicial Council of California. Last verified July 29, 2026. · Official source
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