Permits shall be granted for a maximum of one calendar year, except for ground-based winter cloud seeding, which may have a duration of five years, and may be renewed for five years or ten years, pursuant to section 36-20-108(1), C.R.S. (2011). Consistent with section 36-20-114(2), permits granted for one calendar year may be renewed on an annual basis for four additional calendar years without a public hearing providing the permitted weather modification operation has not materially changed and the permit holder has satisfied all record keeping and reporting requirements.
2 CCR 401-1-10