Correct, you only need to register in the state in which you reside. The exceptions to his rule, as you may already know, would be any addresses where you stay for any length of time.
As you've alluded to, it would certainly be prudent to check with someone of authority as to whether you need to register. In California, I would suggest checking with the attorney that represented you in the matter, if you used one. If not, you can contact the local sheriff's office, they likely have a sex offender division, that would be the people you need to speak with.
Similarly, in Nevada, you can contact the sheriff's office in the area in which you intend to reside, again requesting the sex offender division.
If the information you receive is consistent with what we've discussed, you should be in good shape. As a note, I would suggest writing down the name, rank and location of the person you spoke with as well as the date. This information will come in handy if there is any trouble in the future related to this issue. If the information you receive is inconsistent with what we've been discussing, you might want to consider retaining an attorney in that area to assist. Based on the information we've been able to locate, it certainly appears that you are exempt from the registration requirements.
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