That only applies if both countries are party to the treaty regarding apostilles.
What’s an apostille and why so important?
International certification of the document (for those countries who signed the treaty).
I don’t know about other states, but in IL you do this at the Secretary of State’s office.
This is still the case, although there’s a slight distinction between a child and a grandchild of an Irish citizen. The former are automatically considered Irish citizens themselves, and can get a passport just by showing the proof of their parentage; the latter have to actually apply for citizenship first, but it’s a straightforward process if the documentation is there.
The restrictions have all been lifted now for the 2004 accession states (they could only be imposed up through 2011). They’re still in place in some countries for Romania and Bulgaria, which joined the EU in 2007. These restrictions will also have to be lifted after seven years.
AFAIK the only restriction states are allowed to impose is labour market access - so accession state citizens are still free to travel throughout the EU, and to take up residence if they are self-supporting, including through self-employment. They just don’t have the same automatic entitlement to work as someone else’s employee.
Interesting…my maternal grandfather was born in Ireland, in 1889. That means that he was a British subject. Can I apply for UK citizenship based upon that?