Sometimes "preservation carpenter" is just a fancy name for a maintaince person, but preservation is a completely different field than restoration, rehabilitation etc. Many people do not realize this and call a restoration person for a building they really want "preserved". Even architects have this problem and a preservation architect is in a very different field than a regular architect. I use quotes on "preserved" because this word, like the word perminant, can imply eternal life which is not true for any building. Thus, "impermanent architectre" is a misnomer.

"Poverty is preservation" since people without the money to remodel, restore, etc. leave things alone and thus preserve it.

The word "code" is a mixed blessing! It gives the power of how an old building is changed to a code officer who sometimes does not know the meaning of the words preservation, restoration, etc. Energy codes and stairway codes are good ideas but can very effectively destroy historic buildings! National codes also destroy the regional variation which makes historic buildings interesting on a cultural level. But, codes are a "minimum standard", helping to assure the quality of buildings.

The different meanings of words in various countries are not right or wrong, just different. You just have to remember which country you are talking about!

Jim