natural monument tree
Hi I would like to ask about natural monument tree which is a concept of protecting valuable/old/or trees with historical story. There is an official list of them and they have a law stating what trees exactly can be nominated and aprooved. They usually usted to have a plaque (at least in the past(legaly they are still obligated to have it but signs get usually stolen/destroyed)-nowdays they mostly just have a page dedicated to them on a city webpage with a picture of the tree, its history and a map showing its location like for example this- https://liptal.cz/obec/stezka/pamatne-a-vzacne-stromy-v-obci/bod/liptalsky-buk-lesni-cervenolisty-kultivar). So I would liek to ask-is it possible to nominate such a tree (that is legally wieved as protected historical object) even if it does not have a sign anymore (as everything is going digital) BUT it has several half meters metal collums around it that protect it so it shows that it is something protected by municipality (somehow the chain conecting them got stolen-and I suspect that happen to the sign too but it has not been there for almost 2 decades so I can´t tell what exactly happaned).
So can these trees be nominated withaut the sign (but with man made protective bariers still around them)?