The Texas Flag Code was first adopted in 1933 and completely revised in 1993. The following is a summary of the rules concerning the proper display of the state flag:
Flown out-of-doors, the Texas flag should not be flown earlier than sunrise nor later than sunset unless properly illuminated. It should not be left out in inclement weather unless a weatherproof flag is used. It should be flown with the white stripe uppermost except in case of distress.
When the flag is displayed against a wall, the blue field should be at the flag's own right (observer's left).
When the flag is displayed vertically, the blue stripe should be uppermost and the white stripe should be to the state flag's right (observer's left). The state flag should be flown on all state holidays and on special occasions of historical significance, and it should fly at every school on regular school days.
If the state and national flags are both carried in a procession, the national flag should be on the marching right (observer's left) and state flag should be on the national flag's left (observer's right). If the state and national flags are displayed from crossed staffs, the state flag should be on the national flag's left (observer's right) and behind the national flag's staff.
No flag other than the national flag should be placed above or, if on the same level, to the state flag's right (observer's left). The state flag should be underneath the national flag when the two are flown from the same halyard.
When flown from adjacent flagpoles, the national flag and the state flag should be of approximately the same size and on flagpoles of equal height, and the national flag should be on the flag's own right (observer's left). The state flag should neither be flown above the flags of other U.S. states, nations and international organizations on the same flagpole, nor be flown from a higher adjacent flagpole.
The state flag should never be used for any utilitarian or strictly decorative purpose. No advertising should be placed upon the flag or flagstaff, and no picture of the flag should be used in an advertisement. When the state flag is in such condition that it is no longer a suitable emblem for display, it should be destroyed, preferably by burning.