129. 'Strictly required by the exigencies of the situation'.

States may derogate from provisions of the European Convention on Human Rights1 only where derogation is strictly required by the exigencies of the situation2, and in assessing whether a measure is so required the Convention imposes a strict necessity or (in Convention terminology) 'proportionality standard'3. In deciding whether a state has gone beyond the extent strictly required by the exigencies of the crisis, the court must also give appropriate weight to such relevant factors as the nature of the rights affected