Texas Multijurisdictional Practice (MJP)
Texas Disciplinary Rules of Professional Conduct and Rule 8.05 address unauthorized and multijurisdictional practice. See the MJP hub for general background.
Texas uses Rule 5.05 numbering. Rule 5.05(c) provides an in-house counsel safe harbor for services to the employer and organizational affiliates without Texas admission when court admission is not required.
Temporary practice
Other temporary or ancillary practice may be permitted under applicable Texas disciplinary rules when requirements are met. Court appearances remain subject to pro hac vice.
House counsel
Texas has no separate house-counsel registration; see Rule 5.05(c).