If you checked all provinces on you EE profile, as soon as 1 of the provinces choose you, the system will automatically make you invisible for the other provinces (given that you accepted such provincial invitation).
But, that's doesn't necessarily mean that you MUST land/settle there.
On CIC's website, this is clearly stated here (http://www.cic.gc.ca/english/newcomers/about-pr.asp)
"What permanent residents can do
As a permanent resident, you have the right to:
- get most social benefits that Canadian citizens receive, including health care coverage,
- live, work or study anywhere in Canada,
- apply for Canadian citizenship,
- protection under Canadian law and the Canadian Charter of Rights and Freedoms.
You must pay taxes and respect all Canadian laws at the federal, provincial and municipal levels."
Of course one is advised to try and start a living at the province that nominated you, but according to Canadian laws, you're no obliged to live here or there. You have freedom of choice.
Also there is a BIG difference between landing and settling: MOST people land at Toronto, given that it's the major airport and all.
If I do indeed get nominated to SK, the flight I'm gonna be choosing to take me there has to stop at Toronto (there are other options, including going via USA, Minneapolis, and then straight to Regina, but those are longer flights and more expensive flights). Landing ALWAYS occurs at the first canadian airport you touch. So, if you land in Toronto for a connection flight to you final destination, your LANDING procedures (for immigration purposes) will be made at Toronto.
The whole thing is: you chose a certain province to nominate you. Most of the times (myself included) people choose the easiest ones, or the ones with available/open programs at that time, as their dream is to go to Canada, no matter where (maybe except the most northern provinces lol). But, as it is also my case, most of the candidates start to grown fond of the provinces they've applied to.
I never even thought of Saskatchewan, until I saw that they have a relatively "simple" process. That piece of information, alone, was sort of a game changer. After some research, I realized that SK, more specifically Regina, could indeed be an incredibly good opportunity to make a great living, find good job opportunities, start and raise a family with my wife and my dog, contribute to the community...
Ok, ok, a load of people say that it has a high crime rate and bla bla bla, but high compared to what? To other canadian cities? Ok, it could be higher than Vancouver, lets say. But surely isn't higher than Brazil... From january 2013, to august 2014, there where 14 homicides in Regina. 18 months, 14 homicides. Less than one a month.
Where I live at, Curitiba, south of Brazil (often considered one of the best, if not the best city to live in Brazil) there were 380 homicides on 2013 alone. 380 in 12 months. 31.6 a month. 1.04 a day. In two weeks there were more homicides in my city than in over 18 months in Regina... Last week 4 got killed at an ambush on walmart parking lot. Yesterday 2 man fired over 10 shots right in front of where I work at (exactly in front, 1 of the shots hit the glass door on the entrance). No1 was harmed, but still...
Regina, poor Regina, only 9th place on the canadian's best cities to live list... (sarcasm mode off)
Cans you see the difference here?
Well, back to topic...
Nowhere in their application guide, FAQ, website or whatever is it stated that it is mandatory for you to live there! In bona fide, we are all encouraged to do so, as that was the province which nominated us.
It's more of a matter of one's moral standards. The law says that you can go anywhere, work anywhere, live anywhere, once you're a permanent resident. If you're nominated by a province and CIC aproves your application, you
will receive permanent residency status. Meaning you can go anywhere, work anywhere, live anywhere...
But won't you give the province that nominated you, at least a shot? I sure will, at Regina and I'm pretty confident that I won't be disappointed at all.