Would a passport containing no sex category be internationally recognised? Assume that a country removes the sex category from its legal system and thus also from its passports. Just like the hair color or foot size are no legal category. Would this cause problems for its citizens to travel internationally? I found that the 'International Civil Aviation Organization' standardising machine-readable passports includes the category sex in its formats (see https://www.icao.int/publications/Documents/9303_p3_cons_en.pdf). But would it cause problems if this category is not present on the passports of this country? Or could this circumvented by assigning the sex 'X' to all citizens?
The recognition of other country’s passports is a courtesy Each nation is sovereign over its own borders. So who they allow in (and out) is a matter for them. For example, many Arab countries will ban your entry if you have an Israeli stamp in your passport no matter what nationality it is. So, yes, any country can decide not to record sex in a passport and, yes, there may be consequences in other nations.
Yes. At international borders and international airports (because those are the equivalent of a border), US customs officers may do searches of people and belongings without a warrant and without any particular reason to think they'll find contraband. This includes the authority to do some level of disassembly of the car, if they then reassemble it. See United States v. Flores-Montano, 541 U.S. 149. This is known as the "border search exception." Moreover, police normally don't need warrants to search your car if it was mobile when they found it and if they have probable cause to believe they'll find contraband. This is known as the "automobile exception" or the "motor vehicle exception." It was established in Carroll v. US, 267 U.S. 132. Individual states may have stricter requirements on police searches, but the Fourth Amendment doesn't require police to get a warrant to search your car if, say, you drove it up to a checkpoint and they have probable cause. The difference at a border is that they don't need probable cause and the car never had to be mobile: they can search you on a hunch.
Yes, in most jurisdictions citizenship or residency is not a pre-requisite for standing. However, be aware that there are plenty of jurisdictions where the practical effect of being non-native gives you effectively no chance of winning. "Fair" in some countries means their citizens always beat foreigners.
From TransEquality.org: People who were assigned female at birth are not required to register with the Selective Service regardless of their current gender or transition status. When applying for federal financial aid, grants, and loans as a man, however, you may be asked to prove that you are exempt. To request a Status Information Letter (SIL) that shows you are exempt, you can either download an SIL request form from the Selective Service website (http://www.sss.gov/PDFs/SilForm_Instructions.pdf) or call them at 1-888-655-1825. This service is free and the exemption letter you will receive does not specify why you are exempt so it will not force you to out yourself in any other application process. The Selective Service does, however, require a copy of your birth certificate showing your birth-assigned sex. If the sex on your birth certificate has been changed, attach any documentation you have to that affect. Once you receive your Status Information Letter, keep it in your files. For those FTM people who transition before their eighteenth birthdays and change their birth certificates, it is also possible to register with the service. However, no one may register after their twenty-sixth birthday. Also, please note that although Selective Service materials refer to transgender people as “people who have had a sex change,” their policies apply to those who have transitioned regardless of surgical history. The referenced form has a section where you can declare your gender assigned at birth, and you must attach a copy of your birth certificate. It would appear that having your gender assigned as female at birth does in fact exempt you from the requirement to register with selective service, and as a result you should not be penalized for any purpose related to your not having registered.
See https://www.fec.gov/help-candidates-and-committees/candidate-taking-receipts/who-can-and-cant-contribute/, the section on "Foreign Nationals". The Commission stated, in AO 1998-14, that the use of any surname on a contribution check (or similar instrument) would not, by itself, give any reason to inquire as to the person’s nationality. Nonetheless, the Commission advised the committee to take the following minimally intrusive steps to ensure that the contributions it received did not come from foreign nationals: Ensure that public political ads and solicitations directed to audiences outside the U.S. contain a summary of the foreign national prohibition of 52 U.S.C. § 30121. Make further inquiry into the nationality of the contributor if the committee receives a contribution postmarked from any non U.S. territory. Make further inquiry into the nationality of the contributor if the committee receives a contribution indicating that either the bank or the account owner has a foreign address. In all of the these instances, if the contribution is submitted along with credible evidence (for example, a copy of a valid U.S. passport) that the contributor is a U.S. citizen, a U.S. national or a permanent resident alien, no further inquiry need be made. However, if the committee has actual knowledge that the contributor is in fact a foreign national, it may not rely on these documents as a defense. So, if the donor has been informed of the rules and gives a US address, the campaign can assume that they are eligible to donate, unless the campaign has actual knowledge that they aren't. If they give a non-US address, the campaign is supposed to get some other proof of nationality. By the way, that page also explains that the first part of your question is slightly wrong. It isn't only US citizens who are allowed to donate - US nationals (a rather rare category consisting mostly of people from certain US territories) and permanent residents are also eligible.
The short answer is, in absence of a treaty or convention governing travel, then the law of the country over which the plane is located governs for the time the plane is in overflight. Laws of a jurisdiction (a country, or a state) are generally taken to extend upward from their boundaries (and downward for the control of mineral rights, etc.). There are a number of jurisdictional cases where service of process (presenting a defendant with a copy of citation starting a civil suit) or an arrest has taken place on-board aircraft where the action had to take place over a given country or state to invoke jurisdiction. As mentioned in the first sentence, there is nothing to prevent countries for entering into a Treaty or agreement that would alter the basic scheme, but absent a treaty or convention, the basic scheme of boundary extension would apply.
Question: Do I need a EU passport or EU ID card to legally work in the EU (or establish that I have the right to work in the EU)? Or is a certificate of citizenship sufficient? Legally, your right to work is not contingent on this and there is no Europe-wide rule that makes holding any document mandatory. Importantly, if you do start working anyway, you are not committing a crime and cannot possibly be banned or forced to leave the country. You do have the right to work from the day you became an EU citizen and if any doubt arises down the line, you should be able to clear it up later. In practice, employers are sometimes supposed to check you are allowed to work (and for that would require some proof of your citizenship) but they don't necessarily need a passport or ID. What's typical on the other hand is that you have to provide an official proof of address (in the countries where you have to register your address with the authorities) and the local social security, insurance, or national tax number. Both of these will require dealing with the authorities and will be considerably more difficult, if not downright impossible, without a national ID card or passport (in fact it can even be difficult with a passport). I worked in multiple EU countries and I don't recall always having to present my ID to employers. I recall at least one instance (in Germany) where I could start working without one (it had just been stolen) and another one (in the Netherlands) where I started on the day after I arrived, without official address nor tax number (BSN). In both cases, I was expected to solve these issues within the first month and you risk a fine if you don't register within a week or two but it was neither illegal nor impossible to start working before all the formalities were completed. None of this means I would be completely comfortable about being months without a passport. But the main issue for you will be entering the country and what your employer's HR department is prepared to tolerate, not any sort of legal obligation to hold a passport to work. Note that in one of the cases I described above I went to the local consulate to get an emergency passport. It wouldn't have been possible back in my country of citizenship but there are some special procedures when you reside abroad. These rules change all the time and depend on your country of citizenship but that could be worth a try.
UK, Identity Documents Act 2010, false identity documents etc: Possession of false identity documents etc with improper intention (1) It is an offence for a person (“P”) with an improper intention to have in P's possession or under P's control— (a) an identity document that is false and that P knows or believes to be false, (b) an identity document that was improperly obtained and that P knows or believes to have been improperly obtained, or (c) an identity document that relates to someone else. Each of the following is an improper intention— (a) the intention of using the document for establishing personal information about P; (b) the intention of allowing or inducing another to use it for establishing, ascertaining or verifying personal information about P or anyone else. ... Possession of false identity documents etc without reasonable excuse (1) It is an offence for a person (“P”), without reasonable excuse, to have in P's possession or under P's control— (a) an identity document that is false, (b) an identity document that was improperly obtained, ... Such an identity document could be an &quot;an immigration document&quot;, &quot;a passport issued by or on behalf of the authorities of a country or territory outside the United Kingdom or by or on behalf of an international organisation&quot; or &quot;a document that can be used (in some or all circumstances) instead of a passport&quot; (e.g. a European country's identity card).