§ 15.016.Other Mandatory Venue

A pointer, and an essential one. Texas scatters mandatory venue provisions across many codes, and this section makes them all operate through chapter 15.

An action governed by any other statute prescribing mandatory venue shall be brought in the county required by that statute.

The provision does two jobs. It keeps the definition of "proper venue" complete, since that definition refers to Subchapter B or another statute prescribing mandatory venue. And it means a venue analysis is never finished by reading this chapter alone.

Mandatory provisions live in the Family Code, the Tax Code, the Property Code, the Insurance Code, the Labor Code, and elsewhere. A practitioner who checks only Subchapter B and files in a county that another code forbids will be transferred, and can be mandamused.

The section imports the other statute whole. It does not add a Texas-wide gloss or a convenience exception — the county is whichever one that statute names, on that statute's own terms.

It also feeds the joinder rules. Because a provision imported here is mandatory venue under Subchapter B, a claim governed by it pulls every related claim from the same transaction into that county under the multiple-claims rule. An outside statute can therefore relocate an entire suit.

The practical discipline is short: identify every cause of action pleaded, check each against Subchapter B and its own governing code, and only then choose a county.