The relationship between teacher morale and teachers' acceptance of principals' authority was examined. The Zones of Indifference Instrument (ZII) was used to measure the degree of acceptance of authority. The Purdue Teacher Opinionnaire (PTO) was also administered to the group of Mississippi teachers to measure their morale. Usable responses were obtained from 159 teachers. The two factors of the ZII, teacher determined practice and administrator determined policy, as well as total ZII score, were significantly correlated with three PTO factors: teacher rapport with principal, teacher salary, and teacher status. The PTO factor, curriculum issues, also correlated significantly with administrator determined policy. Teacher rapport with principal and teacher load accounted for considerable variance in teachers' attitudes toward the acceptance of authority. When the data from both tests were compared, low scores on the following factors were associated with a narrow zone of indifference and high rejection of the principals' authority: teacher-administrator rapport, teacher salary, teacher status, and curriculum issues. It was concluded that there was support for the concurrent validity of the Zones of Indifference Instrument. (GDC)