Just got my permit a few months ago...
No one can legally sell it to another unless that party has a permit..... ( in texas )
Fill out a form,, send in... Texas will send you back a couple copies of it.... Xerox them and provide it to any place that deals with diesel (red) and they can LEGALLY sell to you.
That was the law as explained to me a few months ago by my distributor...
At the same time if you can buy it down the road, even if you got caught the small quantities probably involved, and the fact you could easily prove how you use it.... Not a big deal...
The form I signed included language to the effect that I WOULD NOT sell it or otherwise transfer it.
All it cost me was a stamp and I'm legal..........