College applications: Where does "recommended" end and "required" begin?

[Chedva]

<p>dollyflower, Princeton does more than “recommend” the specific SAT IIs. From the Princeton website:

When applying for admission to Princeton, you must submit official scores for either the SAT Reasoning Test or the ACT. All applicants must also take three SAT Subject Tests. </p>

<p>If you intend to study engineering (B.S.E.), your three SAT Subject Tests should include one test in either physics or chemistry, one test in either Level I or Level II mathematics and a third subject test of your choice.

[url=<a href=“http://www.princeton.edu/admission/applyingforadmission/standardized_testing/]Princeton”>http://www.princeton.edu/admission/applyingforadmission/standardized_testing/]Princeton</a> University | Standardized Testing<a href=“emphasis%20added”>/url</a></p>

<p>“Should” is stronger than “recommended”. It means “Do it.”</p>