'it confines' is correct and usable in written English.
You can use it to express the idea of to impose limits or restrictions on something. Example: This policy confines the media from reporting certain information.
Olney drafted a long dispatch on the history of the problem, declaring that "to-day the United States is practically sovereign on this continent, and its fiat is law upon the subjects to which it confines its interposition ... ...... Bayard delivered the note to the British Prime Minister (Lord Salisbury, who was also serving as Foreign Minister) on August 7 , 1895
Former Unctad staff, NGOs and developing countries have mounted an energetic campaign criticising efforts by developed countries to restrict Unctad's mandate so that it confines its analytical work to trade and investment, keeping its nose out of the global financial markets.
"America does not want to leave any conflicts behind as it confines its power projection in the region," he said.
When it confines its attention to the pandas and the spectacular Chinese landscape, the film, produced with the support of the World Wildlife Fund and the San Diego Zoo, makes reasonably good use of the Imax format; it's like watching an expensive, high-definition slide show in your neighbor's cavernous, steeply banked living room.
Fortunately, it confines its predatory activities to insects.
But a Court does all that its duty compels when it confines itself to the controversy before it.
It confines the judiciary to its proper role in construing statutes, which is to interpret them so as to give effect to congressional intention.
"Get Him to the Greek" wears its hypocrisy lightly, even as it confines Ms. Moss, so soulful and complicated in "Mad Men," to the duties of being the foil of a foil.
