Wotc rulings

[Venusaur]

Im just wondering are the Wotc rulings in the compendium from when wotc owned pokemon legal for play? Because most of the questions I ask here are from the old sets, so I just wanna know.

[PokePop]

Here: http://pkcompendium.hypermart.net/compendium/rulings_compendium_ex.html

Check out the intro section that addresses this very point.