What is every reason for change for the date of successors installation is March 16, 1960?
CREATE TABLE "table1_2159571_1" (
  "state_class" text,
  "vacator" text,
  "reason_for_change" text,
  "successor" text,
  "date_of_successors_formal_installation" text
);
SELECT "reason_for_change" FROM "table1_2159571_1" WHERE "date_of_successors_formal_installation"='March 16, 1960';