if the lines arent stamped with, i believe, OSHA aprroved...etc, somthing approved, then if you get pulled over, and they take gander at it, they'll take your doo, with those lines.
The hoses should be USCG, but like the Temp hoses, they aren't always compatible with automotive fuels. They will let you slide with automotive hoses... but I wouldn't chance using a translucent hose unless it is stamped with a UL or USCG stamp.