owning firearms but keeping them out of state In the US, do states place restrictions on ownership of firearms out of state? For example, if you legally acquire firearms in one state and keep them in that state when you move to another state, are you required to abide by firearms laws such as registration and restrictions on possession in the state you move to?
The general story is that one state does not have jurisdiction over an act carried out in another state. The Wiki on state gun laws claims that ownership in Illinois requires a permit, but the law is here, and in fact the law addresses possession and acquisition, but not ownership, for example 430 ILCS 65/2: No person may acquire or possess firearm ammunition within this State without having in his or her possession a Firearm Owner's Identification Card previously issued in his or her name by the Department of State Police under the provisions of this Act It is legally immaterial that the word "Owner" is in the name of the card. It is likewise claimed that Massachusetts requires a license to own a gun, but from what I can tell the requirements pertain to licenses to possess or purchase, and not just to own. So there seems to be no impediment to actual ownership in the US.
In the specific example you have given, Florida law could not be applied. A state has jurisdiction over a crime under constitutional due process limits on the scope of a state's criminal jurisdiction if the crime is either committed within the state (regardless of where the harm occurs) or is directed at or impacts the state (the classic example is a gunshot fired from the Ohio side of the state line killing someone located in Indiana, which could be prosecuted in either state, or in both states as it doesn't violate double jeopardy to be prosecuted for the same offense by more than one sovereign). Sometimes these issues are framed not as "jurisdictional" per se, but as "conflict of law" questions limited by the constitution. The proof that a crime was committed in the territory where it is applicable is called proof of locus delecti and depends upon the nature of the crime alleged and the location of the act or acts constituting it. To determine where a crime is committed depends on what acts constitute the crime, something that leaves considerable room for flexible interpretation and a careful reading of the exact wording of the relevant criminal statute. The most important limitation on the territorial jurisdiction of a U.S. state is the Sixth Amendment to the United States Constitution. This applies directly in the case of federal criminal prosecutions in the federal courts, and applies in state courts because it is incorporated to apply in state court cases through the due process clause of the Fourteenth Amendment to the Constitution of the United States under 20th century case law applying the "Selective Incorporation doctrine." The Sixth Amendment mandates that criminal trials be conducted “by an impartial jury of the State and district wherein the crime shall have been committed.” If a suspect is not present in a state to be criminally prosecuted, then the options available to a state are (1) to toll the running of the statute of limitations while the suspect is outside the state to the extent permitted by the relevant state statute and the U.S. Constitution, (2) to bring a civil lawsuit against the suspect instead of a criminal prosecution, or (3) to seek extradition of the suspect, which must be granted under certain circumstances under the United State Constitution and reads as follows in the pertinent part: Article IV, Section 2, Clause 2: A person charged in any state with treason, felony, or other crime, who shall flee from justice, and be found in another state, shall on demand of the executive authority of the state from which he fled, be delivered up, to be removed to the state having jurisdiction of the crime. (Note that the Sixth Amendment does not apply to civil lawsuits. Civil lawsuit trials can be conducted in a state other than the state where the breach of contract or tort giving rise to the lawsuit took place for jurisdictional purposes and not infrequently is brought in another state, although constitutional choice of law rules limit the circumstances under which a particular state's laws can be applied to a particular set of circumstances in a lawsuit.) The Sixth Amendment, on its face, prohibits Florida from prosecuting a case in the example given in the question involving a crime that was committed solely in Washington State. Of course, the exact definition of the crime might determine where it was committed. In traditional "common law" "blue collar" crimes there is usually no ambiguity over where it is committed except in the most extraordinary circumstances, but in prosecutions of conspiracies and crimes involving economic activity (such as owning or mailing something), the question of where a crime is committed can grow much fuzzier. For example, one could imagine a differently defined crime prohibiting providing funds to finance a purchase of marijuana in excess of 20 grams being committed both in Washington State and Florida at the same time (e.g. perhaps a purchase of marijuana in Washington State was financed by a Florida bank by delivering cash to a courier in Florida who is bound for Washington State knowing that the cash would be used to finance a marijuana purchase). Similar ideas apply in international circumstances where the Sixth Amendment and Extradition Clause do not apply. But, in those cases, the more flexible and less well defined "law of nations" as interpreted by Congress and the U.S. Supreme Court and the President still does impose some territorial boundaries on prosecutions for actions which are not crimes in the country where they are committed under that country's domestic laws. But, those boundaries are not so hard and fast and the idea that a crime is committed in places where it has an impact allow for considerable flexibility in prosecuting crimes committed outside the United States. It has also been well settled since the earliest days of the United States that "The courts of no country execute the penal laws of another." The Antelope, 23 U.S. (10 Wheat.) 66, 123 (U.S. Supreme Court 1825) and that this applies to states applying each other's penal laws as well. So, Florida cannot enforce a violation of the criminal laws of Washington State in its courts either. If you get in a bar fight in Seattle, you can't be prosecute for assault in a court in Orlando, even if both of the parties to the bar fight were Orlando residents and U.S. citizens. Some notable cases resolving the question of whether locus delecti is present in a particular case include the following: In Hyde v. United States, 225 U.S. 347 (1912) although none of the defendants had entered the District of Columbia as part of their conspiracy to defraud the United States, they were convicted because one co-conspirator had committed overt acts in Columbia (225 U.S., at 363). So conspiracy is a continuing offense committed in all the districts where a co-conspirator acts on the agreement. Similarly, In re Palliser, 136 U.S. 257 (1890) the sending of letters from New York to postmasters in Connecticut in an attempt to gain postage on credit, made Connecticut, where the mail he addressed and dispatched was received, an appropriate venue (136 U.S., at 266—268). A typical state statute on the subject from Colorado's Revised Statutes (2016) is as follows: § 18-1-201. State jurisdiction (1) A person is subject to prosecution in this state for an offense which he commits, by his own conduct or that of another for which he is legally accountable, if: (a) The conduct constitutes an offense and is committed either wholly or partly within the state; or (b) The conduct outside the state constitutes an attempt, as defined by this code, to commit an offense within the state; or (c) The conduct outside the state constitutes a conspiracy to commit an offense within the state, and an act in furtherance of the conspiracy occurs in the state; or (d) The conduct within the state constitutes an attempt, solicitation, or conspiracy to commit in another jurisdiction an offense prohibited under the laws of this state and such other jurisdiction. (2) An offense is committed partly within this state if conduct occurs in this state which is an element of an offense or if the result of conduct in this state is such an element. In homicide, the "result" is either the physical contact which causes death or the death itself; and if the body of a criminal homicide victim is found within the state, the death is presumed to have occurred within the state. (3) Whether an offender is in or outside of the state is immaterial to the commission of an offense based on an omission to perform a duty imposed by the law of this state. Case law under this statute sometimes describes the issue presented under this statute a question of "sovereign jurisdiction." See, e.g., People v. Cullen, 695 P.2d 750 (Colo. App. 1984).
Edit: I didn't notice a that this question was tagged for Canada; this answer is based on U.S. law. "Must you stop walking" and "can the police detain you for leaving" are different questions. Must you stop? I'd expect a lot of variation from state to state, but there are definitely situations in which you must stop. In Ohio, for instance, an officer who "reasonably suspects" that that you have committed, are committing, will commit, or have witnessed the commission of violent felony, is permitted to stop you and ask for your name, address and date of birth, and it is a crime to refuse to provide that information. R.C. 2921.29. But at the moment the officer asks you to stop, you're in a tricky position. If you haven't done anything wrong, you'd be inclined to think that the officer has no basis to stop you and that you're justified in walking away. But if someone just called the police and said someone fitting your description just robbed a store two blocks away, the officer has reasonable suspicion that you committed a violent felony, but you have no way of knowing that. This sort of thing happens pretty much all the time. In the absence of that reasonable suspicion, though, Ohio courts have repeatedly held that it is not obstruction for you to just walk away (or even run!) from the officer. Can the police detain you for walking away? Obviously, if you're in a situation where it is a crime to not answer questions, the police can detain you because they just watched you break the law. But what about when you're within your rights not to answer? The police can still detain you with a Terry stop when they have a reasonable and articulable suspicion that you are committing a crime, or that you just did, or that you're about to. And they can continue that Terry stop until that suspicion is confirmed or dispelled, or until they can't reasonably expect to get anymore information by detaining you. Based on the facts you described, it seems unlikely that they could legally detain you based on your termination of the conversation. Still, I imagine that there could be circumstances where they might stop someone, ask questions, and then reasonably suspect that the person was engaged in a crime based on his decision to walk away, especially if the person hasn't explicitly invoked his Fifth Amendment right to silence.
Is this legal? Generally yes, unless it unlawfully exceeds the scope of the license. Also, if it is, how can I check if it's permitted by the original store's EULA? Read the whole EULA, focusing on terms related to resale, assignment, and transferability.
No. As a superior sovereign, the United States can sue states in federal court without restriction. I’m not sure if that would apply in state court, but the federal government doesn’t generally file cases in state court to begin with. States can also sue each other in federal court, having waived their immunity to lawsuits brought by other states when they agreed to Article III of the Constitution (although Congress has said that these lawsuits must be filed directly in the Supreme Court).
Once you are a Virginia resident, you remain a Virginia resident until you establish a residence in another state. Both your driver's license and your license plate should therefore be renewed in Virginia until you make another state your home.
The United States even allows private ownership of tanks and howitzers with only fairly modest regulation, although the demand is small and some sort of license is required. Most U.S. regulations would be at the state and local level. It is rare for state governments to place regulatory barriers on the ownership of what is basically an armored car, although detailing it in a manner that misleadingly conveys the impression that it is a law enforcement vehicle is usually prohibited. Security companies handling deliveries of cash and executive transportation services currently use equivalent vehicles on a regular basis. Some armaments might be regulated at a local, state or federal level in the U.S., to the same extent that they would be if they were freestanding. Even if the company declined to sell one to you, you could probably buy one in an auction of police department or military equipment that the selling government no longer needs. Such auctions are held on a semi-regular basis.
After some more research, I found several german retailers like Frankonia and Brownells, which do ship firearm magazines to Austria. My reasoning is as follows: If they were regulated in any way, they would either be confiscated or sent back to the store. In either way, the customers would get in contact with the store, and the store would stop shipping magazines to Austria. Since I was unable to find a german store which specifically mentioned that they would not ship to Austria, I am going to assume that they are not regulated and can be purchased freely.