TexasCHLforum.com

Howdy, Stick-Shift, and welcome to the forum. Most of the questions you have asked will be answered in your License To Carry class. One thing that won't be covered, most likely, is that you cannot use the word "security" in reference to your church team. Texas Occupation Code 1702.333
https://statutes.capitol.texas.gov/Docs ... C.1702.htm

I'm a member of the First Baptist Church in my city. If the church had posted 30.06 or 30.07, I would have left and found another church home. What we did instead was to announce, before 1/1/16, that handguns should be covered in the sanctuary during worship (Romans 14). The greeters and ushers will verbally inform anyone carrying openly to conceal before entering the sanctuary. Works well for us. You mileage will vary.

The answer to your question on posting is found in Texas Penal Code Title 7, Chapter 30, sections 30.06 and 30.07.
https://statutes.capitol.texas.gov/Docs ... /PE.30.htm

The short version is you have three methods for communicating your prohibition of licensed firearm carriers. As has been stated, criminals will not abide by your wishes, only peaceful, lawful persons will care.

1. Verbal notice by the property owner or one acting in the stead of the owner.
2. Cards with the verbiage shown in 30.06 and 30.07.
3. Signs meeting the requirements of 30.06 and 30.07.

There are many good sources of information on church safety teams (we cannot call them security) in Texas. The Advanced Law Enforcement Rapid Response Training Center at Texas State University in San Marcos has created both ALERRT and the Civilian Response to Active Shooter Events (CRASE) course. https://alerrt.org/ Your local law enforcement probably has a certified trainer who can present the CRASE training at your church.

Self defense trainers in Texas, such as KR Training, can also consult and train. KR is presenting CRASE, free of charge, on July 13, 2019.
https://krtraining.com/schedule.html

Former Army Ranger John Lovell, of the Warrior Poet Society, has created 12 videos on church security. He is not based in Texas and can call it security.
http://warriorpoetsociety.us/church-security

The Texas Legislature tasked the Department of Public Safety with creating a school safety program. KR Training is also presenting that 2 day course in July. Here is the description: https://krtraining.com/KRTraining/Class ... afety.html I have completed this training and found it quiet good and worth the price. There may be a DPS certified trainer near you.

Again, welcome to the forum.