Did Poland and Hungary withdraw from (i.e. fully denounce) the Convention on Early Notification of a Nuclear Accident?

Question

Wikipedia says so (since 2013), and there's a list on IAEA website that seemingly backs that up... but it's not wholly clear what the list actually means (image/table cropped to Poland.)

Wikipedia's write-up/interpretation:

The states that have ratified the Convention but have since denounced it and withdrawn from the agreement are Bulgaria, Hungary, Mongolia, and Poland.

On the other hand, Poland's gov't website says they are (still) in...

The PAA bears responsibility for the performance by Poland as the contracting party of below treaties, conventions and international agreements: [...]

Convention on Early Notification of a Nuclear Accident, done at Vienna on 26 September 1986 (Date of ratification by Poland: 24.2.1988)

Image cropped to remote lots of other treaties:

So, did Poland really withdraw, i.e. fully denounce the Convention on Early Notification of a Nuclear Accident? (And if so, when?)

Hungary's website is less clear on dates, but also says:

Hungary is a contracting party to the following international conventions on the peaceful, safe and secured use of atomic energy: [...]

Convention on Early Notification of a Nuclear Accident (ENC)

So the Wikipedia claim seems in doubt on that as well.

Answer 1

I think the reference to withdrawal may have been a mistake.

treaties.un.org has a status table for this treaty. They show that Poland ratified the treaty in 1988 but with the following reservation:

The Polish People's Republic does not consider itself bound by the provisions of paragraph 2 of article 11 of the Convention.

This paragraph stated that parties to the treaty agreed to have disputes arbitrated by the International Court of Justice. Paragraph 3 explicitly allowed parties to make such declarations, essentially "opting out" of that arbitration process.

In 1997, Poland withdrew this reservation, so that they now agree to the entire treaty, including the ICJ arbitration clause. I think this may account for the "withdraw" in the IAEA table, which may then have been misinterpreted by the Wikipedia editors as meaning denunciation.

Answer 2

Same thing with Hungary actually; there's a UN table that instead of checkboxes (like IAEA) has a row entries for each event.

Hungary & Poland like many other countries from the Eastern block (at the time), including Russia, signed the treaty with a reservation on a clause about arbitration at ICJ. Some countries, like Hungary, later withdrew this reservation. That the latter event happened after the Berlin wall fell is probably not too coincidental.