I may be reading too much into this, but apparently there is a way to do so, once you've been certified by them to do it.You may not draw from a holster unless certified by the BSC staff.
They have two locations in your target area:
9099 Westheimer Rd.
Houston, TX 77063
(713) 977-3000
1200 S. Mason Rd.
Katy, TX 77450
(281) 693-4867