Tex. Bus. Orgs. Code § 152.304
(a) Except as provided by Subsection (b) or Section 152.801(a), all partners are jointly and severally liable for all obligations of the partnership unless otherwise:
(b) A person who is admitted as a partner into an existing partnership does not have personal liability under Subsection (a) for an obligation of the partnership that:
Acts 2003, 78th Leg., ch. 182, Sec. 1, eff. Jan. 1, 2006.
Acts 2007, 80th Leg., R.S., Ch. 688 (H.B. 1737), Sec. 106, eff. September 1, 2007.
Acts 2011, 82nd Leg., R.S., Ch. 139 (S.B. 748), Sec. 42, eff. September 1, 2011.