Nope, due to height restrictions so the top of the ride would not be visible outside the park (much like Fury and it's temporary permission when originally built)...
Like, these restrictions are NOT purely down to it existing on green belt land, but due to the nearby residential areas... Like pretty much every other park in the world...
The area of green belt the park is on is the boundary/where Zufari is anyway... As I mentioned beforehand...
Let's also bear in mind that Rattlesnake was built in 1998, so if these changes have come about, dates would be very useful, rather than stating "it's on wiki" all the time...