There may be some cases where a risk becomes "uninsurable" as either insurers worldwide are no longer insuring that particular type of risk, or those in similar businesses to the Contractor are not generally taking out that kind of insurance because the premium is so high. This might happen because of changing global conditions (for example, the insurance market in respect of terrorism risk changed radically after 11 September 2001). It would not be equitable for the Contractor to be in breach of the provisions requiring it to hold insurance if the risk was uninsurable. The Contract therefore makes provision for what happens in this event. Details are given in Appendix 3 - Uninsurability.