The phrase "are able to exempt" is correct and usable in written English.
You can use it when discussing the ability to grant an exemption or to indicate that someone has the capacity to be excluded from a rule or requirement.
Example: "The committee members are able to exempt certain applicants from the standard eligibility criteria based on their unique circumstances."
Alternatives: "can exempt" or "have the authority to exempt".
The two nations would be able to exempt certain industries, like defense, from a bilateral treaty.
Despite owing $6.8 million, Mr. Talmo was able to exempt a bounty of assets.
If the well-heeled or politically connected were able to exempt themselves or their children, a draft would only serve to deepen the rifts that divide us.
Under the law, a house of worship seeking to, say, build a sanctuary violating height or historic preservation ordinances might be able to exempt itself.
His capture of Delhi and of the Mughal emperor's treasure gave Nādir booty in such quantities that he was able to exempt Iran from taxes for three years.
It's not clear exactly what the "Don't ask me for a code" tickbox is for, but it looks as though you will be able to exempt your most commonly-used device (say, your day-to-day laptop) from needing 2FA-protected logins.
Marylanders age 65 and older who can currently exempt $1,000 would, over the next four years, be able to exempt $5,000.
Under the present regulation (1185/2003), member states are able to issue the permits to exempt fishing vessels from the finning at sea "ban".
Definitions that emphasize unitive ideologies are able to include Daoism but exempt shamanism from consideration, even though many Daoist visions are variants of shamanic soul flights.
If researchers are able to identify and assess license-exempt programs in their child care quality analyses, accounting for this important characteristic will reduce measurement error, and effect sizes may increase for other variables that enable examination of relationships between child care quality and child outcomes.
