I did not post the rules to say......
Hey you got it wrong and need to do something now!!
It was more so you could consider the rules and then decide what is best for you and your farm. There is no point in going threw the expense of wiring the tank threw conduit all nice and proper now and then move the tank next summer. So if you decide to move it next summer based on the rules you could make a educated decision to leave the wiring farmerized till you could move it.
Yes the rules work both ways. It is more likely that a spark from working around the shop; shop fire; ect is going to catch the tank on fire than the other way around. That is why the rules are so lax on farm tanks. Space between a ignition source. Calling it a heater supply tank; water heater or grain dryer supply brings in more rules. NFPA31