Yes, insofar as the law is brought before the court. But everyone--private citizens and governments alike--are constantly "interpreting" the law, in that they're operating on certain assumptions about what the law means. For example, when you file your taxes, you are, as strange as it sounds, interpreting the tax code.

In this case, there is more than one possible way to interpret the PATRIOT Act. The government has to decide what it thinks the law means, and use that interpretation to guide its actions.

When/if you end up in a court room. The police/FBI decide who to bring to the court.