My pleasure and I'm glad I could help, but just to warn you, snakes and chimps require very different levels of care. The average snake, even a delicate, venomous or giant one is an instinctive, simple solitary animal and can be cared for and will thrive on ten minutes of maintenance a day or even less. (of course for a venomous snake one needs a ton of experience and for a giant snake the keeper needs someone on standby, just for safety reasons).
A chimp however strikes me as the pet from hell. They're highly intelligent, highly sociable, physically very powerful and need a great deal of social and intellectual stimulation if they're to not go insane. They require a far more varied diet than a snakes ratsicles and while it may be possible for someone to work a 9-5 job and take care of a happy healthy chimp, they'd have to be a superhuman saint and not have a life outside of that.
Of course if somebody is unusually gifted, level headed, egoless, passionate and dedicated enough to chimps that they, the public and the chimp will benefit from it, it should be that person's right to keep such an animal.
But there's the catch. How do we sort those kind of people from unrealistic Jane Goodall wannabes or power trippers who want that tiger or huge snake in their garage for a fashion accessory?
I hate to say it, but a lot of people are incompetent enough that they can't so much as handle a sweet tempered teenage domestic dog when it grows out of the cute puppy stage. Some people also overestimate and romanticise their skill handling non-domestic animals. When the untrained animal isn't a dog chewing the furniture but a powerful animal chewing it's owner's head, the margin for error is very unforgiving. Especially when an untrained, uncontrolled and active animal could threaten the public.
Sorting these people and who should do so, is another difficult but fascinating topic. I think maybe some kind of licensing that requires volunteering and safety classes would weed out the worst impulsive airheads, but keeping legal licensing from being a bureaucratic mess would be a challenge.
Okay, I've rambled a bit too much, but you have a great deal of material available now. Good luck and tell me how the teacher liked your paper. 
-----
0.2 chickens
0.2 dog mutts (half ownership, only mine when they misbehave)
0.1 Halflinger horse
0.0 reptiles due to living with
1.1 parents
Still searching for 1.0 WC human