Originally Posted by hank_tree
Again,this is complete horseshit.
RTD talks about the 'every year' thing in The Writers Tale - specifically about feeling smug about finding a way to slot a Dalek into the Tennant specials year without actually having them appear in a traditional role (the one that appears very briefly in The Waters of Mars). He's also said on a few occasions things like that if it were entirely up to him/that simple he'd have skipped them in Series 3 to properly focus on the Master, etc.
So this might've changed. But it definitely existed, from the horses' mouth. I'm not sure why the Nation Estate's position would weaken when their property is now more popular than ever. The relationship definitely changed, though; in the early years of the reboot they demanded hands on scripts and all that for anything Dalek - it seems like they've cooled their jets on all that now.
Mind you, in that interview what I see is not Moffat definitively saying a contractual obligation doesn't exist; I see what could easily be construed either way and what might be a very cleverly phrased answer to obfuscate giving an answer that could aggravate the Nation estate. Specifically:
"You certainly don’t wheel the Daleks out because you’ve got a contractual obligation to provide Dalek. I think Doctor Who is great when there are Daleks in it [and] I don’t think you should go too long without Daleks."
He's not saying there is no contractual obligation (which as we definitively know there was under his predecessor), he's saying he'd put them in either way because what is Doctor Who without them? Which is fair enough.