Texas Local Government Code - LOC GOV'T § 501.354. Agents for Service

(a) The president, each vice president, and the registered agent of a corporation are the corporation's agents on whom a process, notice, or demand required or permitted by law to be served on the corporation may be served.

(b) If a corporation does not appoint or maintain a registered agent in this state or if the corporation's registered agent cannot with reasonable diligence be found at the registered office, the secretary of state is an agent of the corporation on whom a process, notice, or demand described by Subsection (a) may be served.

(c) Service of a process, notice, or demand on the secretary of state is made by delivering two copies of the process, notice, or demand to the secretary of state, the deputy secretary of state, or a clerk in charge of the corporation department of the secretary of state's office. The secretary of state shall immediately forward by registered mail one copy of the process, notice, or demand to the corporation at the corporation's registered office.

(d) Service made on the secretary of state under this section is returnable not earlier than the 30th day after the date of service.

(e) The secretary of state shall keep a record of each process, notice, and demand served on the secretary of state under this subtitle and shall include in the record the time of the service and the secretary of state's action in response to the service.