cheers for explaining that, mate...especially the part in bold makes perfect sense to me. As I assumed, Giovinco's agreement was needed, but it likely already was given when he moved on loan last summer. Still, I wonder if a player can change his mind on such matters and scupper parma's option, else EVERYTHING is in the club's hands.
I wouldn't think so. Parma paid a loan fee to acquire Giovinco as an immediate player, sure, but also with growing his valuation through playtime in mind. Giovinco signed a contract, and player power these days aside, he can't just renege and say he doesn't want Parma to collect on their investment. That's between the clubs. Obviously he could cause a fuss and say he wants to go back to Juventus if he hates Parma or whatever, and they'll obviously take that into consideration when figuring out where he'll play next (as they usually do), but not much he can do in terms of stopping them from "owning half his ass."
Like with Aquilani, he would have agreed to the option to buy him this summer, but what if he had hated it here??? could he not then say no to signing his registration over to juve?? Like giovinco could do now, to parma, say no to them signing half his registration??? Its a complicated situation, that still isn't entirely clear to me.
In this scenario Aquilani would be stranded in Turin if Juve were so inclined. Again, it's an unlikely scenario, though, as unless you have an asshole like Lotito or Hoeness involved, you won't typically see players held against their will.