That's not a "quirk" in Texas law, it IS Texas law.
Premise A: In Texas it is legal for an individual married in another State to marry someone else in Texas.
Premise B: It is illegal in Texas for someone to have more than one spouse.
If that were a picture and you looked it up in the dictionary, it would be the picture next to "quirk". LOL
And it does indeed mean they are not legally married in that state.
There still legally married, if they weren't then they wouldn't be eligible for the benefits.
That seems to be the core point you aren't getting. Just because Texas doesn't recognize the legal marriage, doesn't mean it doesn't exist.
I could put an elephant in a refrigerator, then refuse to recognize that there is an elephant in the refrigerator. That does't mean there isn't an elephant in the refrigerator.
There is no portability like with traditional marriage. As discussed they cannot get a divorce in Texas either, why? Because they're not married.
Texas choosing to not recognize it doesn't mean it doesn't exist.
Basic logic applies here: Couple goes to Iowa, couple gets married in Iowa, they return to Texas, even though the couple is in Texas they are still legally married in 13 states and in all 50 states for federal purposes. If you premise were true, that when they crossed the line in Texas they were no longer married, then they couldn't be filing the paperwork for federal military benefits.
Where is the need in the scenerio to file more than one return?
You said:
As for the IRS filing, that's going to be a fun one when the IRS realizes that someone has managed to gain two federally recognised spouses.
A federal tax return only has two slots for Spousal SSN's, there is not slot for a 3rd. Therefore the individual you reference (Person A) to even attempt to submit two spouses (Persons B & C) to the IRS they would have to submit two tax returns one with Person A & B and the other with Person A & C.
List yourself married filing jointly and list two spouses and their SSNs.
The 1040 only has one slot for a spouse.
In fact, it makes polygamy possible right now. And in fact there was a federal bignmy law for most of our nation's history - to stop polygamy. The last iteration of it was repealed in 1978 (the Edmunds–Tucker Act). Another good piece of news for polgamists.
Repealed in 1978.
Which is what I said, there is not a federal law (that I'm aware of) that makes it a federal crime for bigamy to be imposed on the states. There is a provision for bigamy in the Manual of the Courts Martial for bigamy by military members which would be effective on military installations, but that is not a law applicable to the states in general.
I'm not saying there aren't laws against bigamy, there are, but to my understanding there is no current federal law making bigamy a crime (except for the UCMJ as applied to military members) - the laws against bigamy are state laws. Since all 50 states have laws against bigamy and for federal purposes they would only consider the first marriage as valid, then there is no opportunity to have two spouses for federal purposes.
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