"While rendering the salute to the Texas Flag, a person should stand erect, face the Texas Flag and hold their right hand over the heart."
I think it has been changed, it "used" to be that you face the Texas flag and hold you hand out to where you elbo is at your side and our hand is out.
You put your right hand over your heart with the Pledge.
please show a picture of obama using right hand for the pledge of allegiance.
Right hand
your right hand, over your heart (left side of your body)
Proper procedure? Can either hand (left or right) be used when reciting the Pledge of Allegiance.
Place it on your chest where your heart is.
No, keeping your hand on your heart is showing that you have the same respect. 
During the Pledge of Allegiance to the Texas flag, placing the hand over the heart is a sign of respect and honor. This gesture symbolizes loyalty and commitment to Texas, similar to the tradition observed during the U.S. flag pledge. It reinforces a sense of pride and unity among Texans, acknowledging the state's unique identity and history.
it is honor to the flag
To properly say the Pledge of Allegiance, stand facing the flag with your right hand over your heart. Recite the pledge slowly and clearly, emphasizing each word. It is important to show respect and honor while saying the pledge.
put your right hand over your heart and look at the flag
When reciting the Pledge of Allegiance, individuals typically place their right hand over their heart as a sign of respect. This gesture is a traditional practice in the United States and is meant to show loyalty and honor to the flag. Using the left hand is not customary and may be seen as disrespectful in this context.