TexasCHLforum.com

b) A motorboat operator may not operate a motorboat less
than 26 feet in length and equipped by the manufacturer with an
engine cutoff switch while the motorboat is under way and moving at
greater than headway speed without first verifying that the switch
is operational and fully functional and properly attaching the
lanyard or wireless attachment, as appropriate for the specific
motorboat, to the operator's body or to the clothing or personal
flotation device being worn by the operator.

Really off topic but I just read starting September 1st, if your boat is <26' and has a kill switch , you MUST have that lanyard attached to your body and the switch must work. $200 fine. I am sure the Constables on Lake Conroe will be watching.