Lighthizer said that while the United States and those countries work out the details of possible exemptions, the tariffs would likely not apply during that time span in order to avoid brief disruptions in supply chains. (money.cnn.com)
Undue Hardship: In its First Report, the Committee dealt with possible exemptions under the Canadian Human Rights Act. (ccdonline.ca)
I did find one possible exemption on the IRS Site that exempts clergy. (money.stackexchange.com)