I am a current NPSIA student, you will hard time doing it in 3 semsters - as summer courses are very limited; if you split courses 4-3-3 as semster you may be able to . But keep in mnd it is a very intense program wth a very high course load. I doing a double masters and I am focusing on that only and I am still really struggling, not to mention if you want to also do your law applications as well it is time consuming. I would consider skipping NPSIA if you are going into law. UofO and NPSIA are very complementary but I know some people who did NPSIA and went to do law somehwere else and they said NPSIA did not help them overall