Sorry pretty busy as of late but most utilities aren't going to give access to someone who has a charge that is pending. I would say there are a few that they will let slide but this one I highly doubt any utility will let slide. Spice already has a bad rap and it doesn't show up on a DOT drug test that utilities are mandated to give. How would they know if you are 'high' on the job? I won't say I've ever dealt with anyone who has had this charge but just from hearing others talk about it in the past and knowing how utilities work, then they will basically treat this just like it was a controlled substance (which it now is in some states).
I would wait to try and gain access. Even if the charge does get dismissed, you will have to jump through all the extra hurdles that anyone else would with a similar charge of Marijuana possession etc. More than likely will have to do an extended work history, substance abuse evaluation and speak with the psych/mro.
Don't hold me to it but look at it like this..
If you were Access Supervisor what does the utility or he/she have to gain by hiring someone who has used a 'drug' that doesn't show up on drug tests? There are so many variables of things that could go wrong.. OSHA Recordables, tripping units, loss time accidents.. so many things. Drugs/alcohol -- whether illegal or not in this case -- are pretty much the worst charges that you can have at a nuke plant, which you should know if you've worked nuclear before.
Good luck, but my suggestion is to take your trade or skills elsewhere for a while and let the courts work it out.