"per se" laws per se intoxicated "per se" drugged driving law legal limit in Texas is .08 percent legal limit in Texas is .08 percent "per se" laws "per se" DUI "per se" drugged driving law drove there under the influence "per se" drugged driving laws per se drugged driving laws per se DUI laws "per se" limits “per se” drugged driving law per se DUI legal limit in Texas is .08 percent