Tex. Election Code § 145.037

(a) For the name of a replacement nominee to be placed on the general election ballot, the chair of the executive committee making the replacement nomination must certify in writing the nominee's name for placement on the ballot as provided by this section.

(b) The certification must be signed and acknowledged by the chair.

(c) In addition to the name of the replacement nominee, the certification must include:

(1) the replacement nominee's residence address and mailing address, if different from the residence address;

(2) the name of the original nominee;

(3) the office sought, including any place number or other distinguishing number;

(4) the cause of the vacancy;

(5) an identification of the executive committee making the replacement nomination; and

(6) the date of the replacement nomination.

(d) The chair must deliver the certification to:

(1) the secretary of state, for a statewide or district office; or

(2) the authority responsible for having the official ballot prepared, for a county or precinct office.

(e) The certification must be delivered not later than 5 p.m. of the 71st day before election day.

(f) A certification of a replacement nominee that is delivered by mail is considered to be delivered at the time of its receipt by the appropriate authority.

(g) A replacement nominee's name may not be certified if, before delivering the certification, the certifying authority learns that the replacement nominee's name is to be omitted from the ballot under Section 145.035.