From the New Brunswick PNP program FAQ at http://www.gnb.ca/Immigration/faqs2007-e.asp#16
If I am successful in immigrating to New Brunswick through the Nominee Program, how long do I have to stay in the province?
The PNP's usually make you sign a statement saying that you intend to settle in their province. If you leave their province as soon as you get PR, they might feel that you lied on your application form. Lying on your application as they say above can cause your PR to be revoked and you deported. I have not heard about them going after anybody yet but that doesn't mean they wont. Maybe they don't have much of a case but it's not advisable to get into that kind of trouble with immigration if it is avoidable. Since mdoc is already there for a year, he is probably ok to leave now. Might be a good idea to call NB PNP program and ask if they are ok with it and if they would do anything about it.