That article is not correct. There is no hook limit on A-rigs in Texas.
I've thrown a 9 wire rig with 9 hooks.
Actually you are both wrong. 100 is the limit.
Game fish may be taken only by pole and line (which includes rod and reel), except as otherwise provided in this guide. A person may fish with multiple poles or other devices, except as provided herein. In fresh water, there is a limit of 100 hooks on all devices combined.