21. Subject to sections 21.1, 22 and 24, every dam must be able to withstand any of the following safety check floods, taking into account the highest dam failure consequence category in flood conditions:
21. Subject to sections 23 and 24, the characteristics of every dam must ensure that it can withstand as a minimum the safety check flood described in the table below that corresponds to the failure consequence category of the dam under sections 17 and 18. However, if the dam failure consequences were assessed on the basis of a dam failure analysis, the category to be considered for the purposes of the table is the highest consequence category resulting from the examination of dam failure scenarios in flood conditions.