This excerpt taken from the ALL 10-K filed Feb 24, 2005.
Reinsurance may be unavailable at historical levels and prices which may limit our ability to write new business
Market conditions beyond our control determine the availability and cost of the reinsurance we purchase. No assurances can be made that reinsurance will remain continuously available to us to the same extent and on the same terms and rates as are currently available. If we were unable to maintain our current level of reinsurance or purchase new reinsurance protection in amounts that we consider sufficient and at prices that we consider acceptable, we would have to either accept an increase in our net liability exposure, reduce our insurance writings, or develop or seek other alternatives.