My husband is a maltese citizen myself his wife and 4 children 9yrs to 17yr will be moving there october 2020 from the uk. My husband has not lived there in 28 yrs and he was just 14 then he has been to visit. How do we go ahead and get his social security number ?. My husband family still live there too. Is there anything else he will need we know what we will need. Thanks in advance