Then those books they referenced won't do you any good. Texas uses NCAA rules, not NFHS.
http://www.taso.com is your Texas official's website.
http://www.dfoa.com is your Dallas football official's website.
I would suspect that someone on the contact us list on DFOA can provide you with a contact person in the Fort Worth chapter.
Email me - I have 1 friend in the FW chapter, I could get the contact info from him if you can't get it through the other sources.
Your rulebook (well... last year's):
http://www.ncaa.org/library/rules/20...ball_rules.pdf