Texas Government Code - GOV'T § 302.015. Requisites of Filing

(a) Except as provided by Subsection (b), a statement is considered to be filed in compliance with this subchapter if the postmark shows that it was sent to the Texas Ethics Commission at its official post office address by registered or certified mail from any point in this state before the filing deadline.

(b) A statement required to be filed on the day before a regular or called session convenes must actually be delivered and in the possession of the Texas Ethics Commission not later than midnight of that day.