Insight

Changes to Discovery Rules

In the ever-evolving landscape of litigation in Texas, staying abreast of procedural changes is imperative for any trial attorney desiring to achieve successful outcomes for their clients.

Kathryn J. Murphy

Kathryn J. Murphy

July 22, 2025 12:48 PM

In the ever-evolving landscape of litigation in Texas, staying abreast of procedural changes is imperative for any trial attorney desiring to achieve successful outcomes for their clients. There have been significant recent changes to the discovery rules that went into effect September 1, 2021, and September 1, 2023. Understanding and navigating these rules is a strategic advantage that can impact the trajectory and resolution of cases.

Cases Not Governed by the Family Code

Except for suits governed by the Family Code filed after September 1, 2023, and unless there is an exemption, agreement by the parties, or court order, for all cases filed on or after January 1, 2021, a party is subject to three types of mandatory disclosures – initial disclosures, testifying expert disclosures, and pretrial disclosures. Further, a party cannot serve discovery on another party until after the other party’s initial disclosures are due.

  • Initial Disclosures – A party must provide initial disclosures within 30 days after the filing of the first answer or general appearance, unless the parties agree or there is a court order designating a different time. Like the old requests for disclosure, a party must provide to the other parties the items set forth in the statute, such as the legal theories and factual bases of that party’s claims or defenses and the name and contact information of persons who have knowledge of relevant facts. Significantly, the new rules require that the party provide a copy or a description of all exhibits that the party may use in court, unless the exhibit would be used solely for impeachment.
  • Testifying Expert Disclosures – A party seeking affirmative relief must provide testifying expert information to the other party 90 days before the end of the discovery period, and a party not seeking affirmative relief must provide such information 60 days before the end of the discovery period. Additionally, the new rules that went into effect September 1, 2023, require disclosure of the expert’s qualifications to include all publications authored by the expert in the last 10 years, a list of cases in which the expert testified as an expert at trial or deposition (unless the expert is an attorney testifying to attorney’s fees), and a statement of the expert’s compensation.
  • Pretrial Disclosures – At least 30 days before trial, a party must provide to the other parties and file certain information about the evidence that the party may present at trial other than solely for impeachment. A party must provide the name and contact information of each witness, separately identifying the witnesses the party expects to call and the witnesses the party may call if the need arises, as well as an identification of each document or other exhibit, including summaries, separately identifying the exhibits the party expects to offer and those it may offer if the need arises.

Cases Governed by the Family Code

Effective September 1, 2023, required disclosures no longer apply to cases governed by the Family Code. In cases governed by the Family Code filed after September 1, 2023, parties can use requests for disclosure to obtain certain information from other parties and experts, and parties can serve discovery with the initial pleading. For family law cases filed prior to September 1, 2023, it is important to note that the discovery rules in effect September 1, 2021, will apply.

Additionally, the new rules provide that a party may not assert a work product privilege to a request for disclosure. Further, a response to a request for disclosure that has been changed by an amended or supplemental response is not admissible and may not be used for impeachment.

For cases under the Family Code, a party may obtain information concerning testifying experts only through a request for disclosure, deposition, or report.

Protections from Discovery

For all civil cases, including cases governed by the Family Code, all communications between a party’s attorney and a testifying expert are now protected from discovery, except for communications that relate to the expert’s compensation, facts that the party’s attorney provided and that the expert considered in forming the expert’s opinions, or assumptions that the party’s attorney provided that the expert relied on in forming the expert’s opinions.

Further, a draft expert report or draft disclosure is protected from discovery, regardless of the form in which the draft is recorded.

Conclusion

Understanding and mastering the discovery rules is paramount to being an exceptional trial lawyer. By diligently adhering to discovery procedures and staying up to date with the new laws, attorneys can bolster their cases, safeguard their clients’ interests, and ultimately achieve favorable outcomes.

This article was originally featured in the Dallas Bar Association’s September 2024 Headnotes.

Trending Articles

2026 Best Lawyers Awards: Recognizing Legal Talent Across the United States


by Jamilla Tabbara

The 2026 editions highlight the top 5% of U.S. attorneys, showcase emerging practice areas and reveal trends shaping the nation’s legal profession.

Map of the United States represented in The Best Lawyers in America 2026 awards

Gun Rights for Convicted Felons? The DOJ Says It's Time.


by Bryan Driscoll

It's more than an administrative reopening of a long-dormant issue; it's a test of how the law reconciles the right to bear arms with protecting the public.

Firearms application behind jail bars

2026 Best Lawyers Awards in Canada: Marking 20 Years of Excellence


by Jamilla Tabbara

Honoring Canada’s most respected lawyers and spotlighting the next generation shaping the future of law.

Shining Canadian map marking the 2026 Best Lawyers awards coverage

Revealing the 2026 Best Lawyers Awards in Germany, France, Switzerland and Austria


by Jamilla Tabbara

These honors underscore the reach of the Best Lawyers network and its focus on top legal talent.

map of Germany, France, Switzerland and Austria

Best Lawyers 2026: Discover the Honorees in Brazil, Mexico, Portugal, South Africa and Spain


by Jamilla Tabbara

A growing international network of recognized legal professionals.

Map highlighting the 2026 Best Lawyers honorees across Brazil, Mexico, Portugal, South Africa and Sp

How to Sue for Defamation: Costs, Process and What to Expect


by Bryan Driscoll

Learn the legal standards, costs and steps involved when you sue for defamation, including the difference between libel and slander.

Group of people holding papers with speech bubbles above them

Build Your Legal Practice with Effective Online Networking


by Jamilla Tabbara

How thoughtful online networking supports sustained legal practice growth.

Abstract web of connected figures symbolizing online networking among legal professionals

Algorithmic Exclusion


by Bryan Driscoll

The Workday lawsuit and the future of AI in hiring.

Workday Lawsuit and the Future of AI in Hiring headline

Blogging for Law Firms: Turning Content into Client Connections


by Jamilla Tabbara

How law firms use blogs to earn trust and win clients.

Lawyer typing blog content on laptop in office

Reddit’s Lawsuit Could Change How Much AI Knows About You


by Justin Smulison

Big AI is battling for its future—your data’s at stake.

Reddit Anthropic Lawsuit headline

How to Choose a Good Lawyer: Tips, Traits and Questions to Ask


by Laurie Villanueva

A Practical Guide for Your First-Time Hiring a Lawyer

Three professional lawyers walking together and discussing work

The 2026 Best Lawyers Awards in Chile, Colombia and Puerto Rico


by Jamilla Tabbara

The region’s most highly regarded lawyers.

Map highlighting Chile, Colombia and Puerto Rico for the 2026 Best Lawyers Awards

Common-Law Marriage in Indiana: Are You Legally Protected?


by Laurie Villanueva

Understanding cohabitation rights and common-law marriage recognition in Indiana.

Married Indiana couple in their home

Why Jack Dorsey and Elon Musk Want to 'Delete All IP Law'


by Bryan Driscoll

This Isn’t Just a Debate Over How to Pay Creators. It’s a Direct Challenge to Legal Infrastructure.

Elon Musk and Jack Dorsey standing together Infront of the X logo

AI Tools for Lawyers: How Smithy AI Solves Key Challenges


by Jamilla Tabbara

Understand the features and benefits within the Best Lawyers Digital Marketing Platform.

Legal professional editing profile content with Smithy AI

Alimony Explained: Who Qualifies, How It Works and What to Expect


by Bryan Driscoll

A practical guide to understanding alimony, from eligibility to enforcement, for anyone navigating divorce

two figures standing on stacks of coins