TEXAS RULES OF CIVIL PROCEDURE / RULE 3a
TRCP 3a: Local rules, forms, and standing orders
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Rule 3a, illustrated

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(a) General Rule. An administrative judicial region or a court governed by these rules may promulgate local rules, forms, and standing orders that govern local practice.
(b) Relationship with Other Authorities. Local rules, forms, and standing orders must not be inconsistent with state or federal law or rules adopted by the Supreme Court of Texas. This requirement extends to any time period provided by these rules. If adopted by a court, local rules, forms, and standing orders must not be inconsistent with any rule of the administrative judicial region in which the court is located.
(c) Publication Required. To be effective, local rules, forms, and standing orders must be published on the Office of Court Administration’s website.