Copied from that linked document:
E Who Are Residents and Nonresidents
A resident is any individual who meets any of the following:
•Present in California for other than a temporary or transitory purpose.
G Guidelines for Determining Residency
The underlying theory of residency is that you are a resident of the place where you have the closest connections.The following list shows some of the factors you can use to help determine your residency status. Since your residence is usually the place where you have the closest ties, you should compare your ties to California with your ties elsewhere. In using these factors, it is the strength of your ties, not just the number of ties, that determines your residency.
This is only a partial list of the factors to consider. No one factor is determinative. Consider all the facts of your particular situation to determine your residency status.
Factors to consider are as follows:
•Amount of time you spend in California versus amount of time you spend outside California.
•Location of your spouse/RDP and children.
•Location of your principal residence.
•State that issued your driver’s license.
•State where your vehicles are registered.
•State where you maintain your professional licenses.
•State where you are registered to vote.
•Location of the banks where you maintain accounts.
•The origination point of your financial transactions.
•Location of your medical professionals and other healthcare providers (doctors, dentists etc.), accountants, and attorneys.
L Meaning of Domicile
The term “domicile” has a special legal definition that is not the same as residence. While many states consider domicile and residence to be the same, California makes a distinction and views them as two separate concepts, even though they may often overlap.
For instance, you may be domiciled in California but not be a California resident or you may be domiciled in another state but be a California resident for income tax purposes.
Domicile is defined for tax purposes as the place where you voluntarily establish yourself and family, not merely for a special or limited purpose, but with a present intention of making it your true, fixed, permanent home and principal establishment.
It is the place where, whenever you are absent, you intend to return. The maintenance of a marital abode in California is a significant factor in establishing domicile in California.
Change of Domicile
You can have only one domicile at a time. Once you acquire a domicile, you retain that domicile until you acquire another.
A change of domicile requires all of the following:
•Abandonment of your prior domicile.
•Physically moving to and residing in the new locality.
•Intent to remain in the new locality permanently or indefinitely as demonstrated by your actions.
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In G it appears to indicate how it is actually the individual who makes the determination of Residence or Domicile, rather than the state. This determination would be based upon the "list of items" to consider. Because "no one factor is determinative" it would lend support to how meeting several or most of the factors would suffice in determining one's residence and/or domicile status.
In "L Change of Domicile
," what constitutes "abandonment of domicile" in law? It seems it could be the changing of most of the items listed in section G from one place to another. After all, "domicile" is "where you voluntarily establish yourself and family" is it not?
Consider this from the perspective of how the above might be applied to a full time RVer who chooses their domicile for convenience due to their transitory nature. They don't physically move to their new domicile if they are always traveling, yet it is their legal domicile, right?
Likewise, a full time RVer clearly has no intent to remain the the new locality permanently or indefinitely, as their actions demonstrate they don't intend to remain anywhere at all, correct?
If someone actually owns an RV, and do not own property in CA, yet use hookups at an RV slot rented in San Diego to connect to the RV. And, the RV rental agreement includes use of the house and grounds as part of the RV space contract, wouldn't this be legit?
Frankly, it seems the guidelines from that link do provide the formula for establishing a domicile elsewhere, while enjoying Southern California for many months of the year for a temporary or transitory purpose as an RVer.
It would be a significant challenge for the state of CA to build a case, convince a grand jury, and then win in court beyond reasonable doubt were the formula they provide be applied.
They would have to have a good reason to pursue this, and staying under the radar ought to be easy enough once the lion's share of the bullet points are taken care of.
I'd look into this and see if any of my suspicions after a read of that document are helpful. (preceding is opinion, rather than legal advice)