They do not have power of attorney to sign documents on behalf of their principals. (remonline.com)
Agency is a relationship between a principal (seller or buyer) and an agent (broker) who acts on behalf of the principal in dealing with a third party. (realtormag.realtor.org)
We regularly monitor legislation and policies directly affecting education, communicate with congressional offices and the U.S. Department of Education, and actively participate in coalitions to advance sound and constructive federal education policies on behalf of principals across the country. (nassp.org)