It nominally dates to 1996, but was created and is amended by the Legislature. So it lacks the layers of approval to ammend that we have in the USA. It is more like US Code than a real constitution.
It gets much worse though:
In 2004, amendments were adopted that significantly changed Ukraine's political system; these changes are sometimes referred to as the 2004 Constitution. In 2010, then-President of Ukraine Viktor Yanukovych reverted these changes on the basis of a ruling made by the Constitutional Court of Ukraine. Following the events of Euromaidan (2013–2014), the 2004 amendments were reinstated.
So maybe we should call it the Coupstitution?
I found an English language translation here
I see nothing about canceling elections or martial law.
Zelenskyy is going rogue. He just had a critic of his killed in a "hand grenade accident". Sounds totally legit, eh Mom? ♡
Top Ukrainian Military Aide Killed By Grenade In Birthday Present
Now, given rumors that Zaluzhny was one of the potential presidential candidates with the strongest backing and largest popularity, outside Zelensky himself, it’s thought that Zelensky needed to send a sharp message to bring Zaluzhny back in line. The assassination of his personal aide was the “horse head in the bed” moment, for those who’ve seen Godfather.So Zelenskyy is acting like a typical Eastern European dictator. Killing the top aide to his main political rival.
This is the guy you and Joe Biden day we need to send another 60 nikon to?
This site may help resolve your research conflict with Ukraine Constitutional Law noted in your comment:
https://freerepublic.com/focus/chat/4195270/posts?page=48#48
Ukraine: Martial Law Introduced in Response to Russian Invasion
Library of Congress
https://www.loc.gov/item/global-legal-monitor/2022-03-03/ukraine-martial-law-introduced-in-response-to-russian-invasion/