Fagbemi said the 1999 Constitution as amended in the 2010 Act can not be visited on the rerun elections conducted in 2008 since it does not have a retrospective effect. (dailypost.ng)
Amendments generally only have retrospective effect in exceptional circumstances. (criminalnotebook.ca)
In Silih v Slovenia (2009) 49 E.H.R.R. 37, the European Court looked again at the question of whether the investigative obligations under Article 2 ECHR have retrospective effect in domestic law. (ukhumanrightsblog.com)