CFR > Title 25 - Indians > CHAPTER I—BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR > SUBCHAPTER H—LAND AND WATER (parts 150 to 183) > PART 161—NAVAJO PARTITIONED LANDS GRAZING PERMITS > SUBPART D—Permit Requirements (§161.300 to §161.308) > 161.307—When may a permittee commence grazing on Navajo Partitioned Land?