43 CFR §3260.12

1. (a)Geothermal resource operational orders for detailed requirements that apply nationwide;
2. (b)Notices to Lessees for detailed requirements on a statewide or regional basis;
3. (c)Other orders and instructions specific to a field or area;
4. (d)Permit conditions of approval; and
5. (e)Oral orders, which will be confirmed in writing.