SCHEMA:
CREATE TABLE table_2159571_1 (reason_for_change VARCHAR, date_of_successors_formal_installation VARCHAR)
USER:
What is every reason for change for the date of successors installation is March 16, 1960?

QUERY:
SELECT reason_for_change FROM table_2159571_1 WHERE date_of_successors_formal_installation = "March 16, 1960"