The phrase "are exempt because of" is correct and usable in written English.
You can use it when explaining the reasons why someone or something is not subject to a particular rule or obligation.
Example: "Students are exempt because of their participation in the volunteer program."
Alternatives: "are excluded due to" or "are free from because of".
Anything related to "sources and methods" - how the spy agency goes about its business - is exempt, because, as the statute reads, "the Director of Central Intelligence shall be responsible for protecting intelligence sources and methods from unauthorized disclosure".
Raised comfortably in an upper-middle-class family, she said she didn't confront prejudice against Mexicans — or the troubling notion that she was exempt because of her privilege and her fair skin — until she moved to Chicago.
Last, inequalities with regard to this tax for carriers with vehicles of less than 3.5 tonnes, for some sectors as opposed to others (such as agriculture and fishing which benefited from high rates of refunding or heavy industry which would be exempt because of quotas) infringe the principle of equity with regard to taxation.
When the European Union introduced new security rules for airports from 1 January 2005, Ørland Airport was exempt, because of the small size of the aircraft.
We also lacked data on the cognitive function of men exempt from conscript examination; if some were exempt because of conditions related to OM and lower cognitive function, we may have underestimated the association between hospitalisation for OM and cognitive function in young adulthood [ 19].
But the largest vehicles -- those that weigh more than 6,000 pounds fully loaded -- are exempt because the relevant portion of the code was written in the 1980's, before the rise of the sport utility vehicle, and was intended to exempt big pickups needed on work sites.
Citizens of most European countries, Canada, Japan and a handful of other nations are exempt because they are not required to obtain visas for travel to the United States.
Ships of United States Lines and American Hawaii Cruises are exempt because they are American-owned and registered.
The latter requires that every stock exchange register with the Securities and Exchange Commission SECC) as a national securities exchange, unless it is exempted because of the limited volume of its transactions, and that it conform to certain rules in its trading practices.
