The holder shall furnish proof of insurance, such as a certificate of insurance, to the authorized officer prior to issuance of this permit and each year thereafter that this permit is in effect.  The Forest Service reserves the right to review the insurance policy and require any changes needed to ensure adequate coverage of the United States in connection with the authorized use and occupancy.  The holder shall send an authenticated copy of any insurance policy obtained pursuant to this clause to the authorized officer immediately upon issuance of the policy.  Any insurance policies obtained by the holder pursuant to this clause shall name the United States as an additional insured, and the additional insured provision shall provide for insurance coverage for the United States as required under this clause.  The holder shall give 30 days prior written notice to the authorized officer of cancellation of the insurance policy by the holder or any modification to the insurance policy by the holder.  Additionally, the holder shall immediately notify the authorized officer of cancellation of the policy by the insurance company. The certificate   of insurance, the authenticated copy of the insurance policy, and written notice of cancellation or modification of insurance policies should be sent to 9 Ten Mile Drive, PO Box 10 Granby, CO 80446.   Minimum amounts of coverage and other insurance requirements are subject to change at the sole discretion of the authorized officer on the anniversary date of this permit .