All Navajo Nation executive branch employees will need to be fully vaccinated against the coronavirus by the end of September or face regular testing. Tribal President Jonathan Nez announced the new rules on Sunday. They apply to full, part-time and …All Navajo Nation executive branch employees will need to be fully vaccinated against the coronavirus by the end of September or face regular testing. Tribal President Jonathan Nez announced the new rules on Sunday. They apply to full, part-time and …