CREATE TABLE table_33767 ("Chapter" TEXT, "Chartered" TEXT, "School" TEXT, "State" TEXT, "Status" TEXT, "Charter Range" TEXT)

What are the active dates for the Montana State University chapter?
SELECT "Charter Range" FROM table_33767 WHERE "School" = 'montana state university'
SELECT "Charter Range" FROM "table_33767" WHERE "School" = 'montana state university'