Back in the late 80's, the NYSE constitution and rules was in book form only. I tried to buy a copy, but was told it was "out of print"!
And not one library in my area had a copy. This includes public, university, law libraries, etc.!
I asked at the public library and they told me sometimes a few copies of books were held back for libraries only to order. I requested they order a copy and they were able to get one. It was "eye opening" to say the least! One thing I saw was that large orders had priority over smaller orders for the same price (thus why my small orders were not going through when the stock hit that price!) I don't know if that is still the case?
These days those rules are on the internet at the following link...
NYSE Rules