I just arrived in the US on the 14th April and will soon arrange for a SSN and marriage.

1. The I-94: All that remains of this in my possession is the part that is clipped on to my passport. It's just the departure record. The rest of the I-94 was taken by the officer at customs. Do I need the complete form, or is what I have fine? I'm assuming the rest is held by someone or other.

I'm a bit worried he should not have taken the top half of the I-94 away from me.

2. The RM 00203.500: The link in the guide is broken, but what I have is this:
https://secure.ssa.gov/apps10/poms.nsf/lnx/0100203500

I haven't read it yet, but from the guide on SSN on visajourney, it seems as though this is just to remind the person at the SSA office that I can indeed apply for a SSN as a K1 holder. Am I right? I don't have to read it or do anything besides bring it with me to the SSA offices?

3. I have until mid July to get married. Does it matter when in the 90 day period we get married? Let's say I get married on the 89th day, is that just as good? Also, can we get married before getting the SSN?

4. On the application for social security card, it says:

"If you are not a US citizen or do not have current lawful, work-authorized immigartion status, you must prove that you have a valid nonwork reason for requesting a card".

So what is my valid nonwork reason for requesting a card?

5. When is a good time to apply for EAD & AOS? Immediately after marriage assuming I have a SSN?

1. What you have is fine.

2. As long as you apply 2 weeks before your I-94 expires, you are entitled to a SSN card. It will not be work authorized, but your number will stay the same even after you receive either your EAD or Green Card.

3. As long as you marry within 90 days of entering the U.S. with your K-1 visa, you are fine. You do not need to apply for your SSN before you get married if you do not want to. I applied for mine 2 days after I got married so that I wouldn't have to change my name later.

4. I can't remember the options on the application form, but you can always ask the person you speak to at the SSA office when you go to apply. Or, someone else here might be able to answer this one.

5. You do not need a SSN to apply for AOS or EAD. You can apply for AOS (the fee includes EAD and AP) as soon as you are married. The sooner you apply, the better.

I thought I was not athorized to work until I received my EAD.

So it will be OK if I tick "legal alien allowed to work" on the SSN forms?

Yes, that's exactly what I did for my wife's SSN card - no questions were asked. Good Luck

Just been doing some reading up on this, and the point that you dont need a SSN to get married. I read the following link and it says "Each applicant must provide a social security number".

http://probate.cuyahogacounty.us/faq/faq_marriage.htm

Simply ask them what do they do in a situation where either of the parties is not "eligible" for a SSN (such as a citizen of another country).