I want to correct this recurring misconception.If a person must be 21 or older to purchase a handgun, then almost all students who would carry are under that age and could not have legally purchased the pistol.
A person 18 to 20 years of age cannot purchase a handgun from an FFL. He or she can legally purchase a handgun from another non-FFL resident of Texas.
There are fewer than 50 CHL holders under age 21. However, about half the people on most college campuses are over age 21 (looked up this number in an earlier discussion of this topic). Probably most of those people do not live on campus. They commute every day. That alone is sufficient reason to allow them to carry when they are in campus buildings.
- Jim