God doesn't need anyone's "permission" to do anything.
I remember Mylon LeFevre saying something like that ("God isn't a rude God. He doesn't force Himself on you without your permission", or something to that effect) and being new to the faith and not well discipled or catechized at all, thinking it was really profound.
But the fact is, God elects who He chooses to elect, He regenerates who He chooses to regenerate, and He saves who He chooses to save.
I think what your question really comes down to is who's prerogative is salvation? Is it ours or God's? The Bible is very clear that it is God's.
The idea of an unregenerate man asking God for salvation is like a dead man picking up a phone and dialing 911 for an ambulance.