Charter school authorizers shape which charter schools open, where they open, and who they serve. We draw on principal agent theory to investigate how the priorities and practices of nine authorizers intersected with charter school applications' attention to the needs of historically marginalized students. Using data from interviews and applications, we find authorizers vary in orientations towards equity and the ways in which they signal that orientation to charter applicants. Our analysis suggests a robust relationship between authorizer mission and the content found in charter applications, demonstrating the influence of authorizing practices on the contents of charter school applications. [For the policy brief, see ED625865.]