It can be stated that what has been prohibited based on Sadd al-Dhara "I" can be permitted on the base of public interest. Sadd al-Dhara "I" is considered as a basic principal in Islamic law. Moreover, many of Fiqh rulings that are seen as Sharia significant rulings is based on Sadd al-Dhara "I". For example, many cases have been prohibited in Islamic law based on Sadd al-Dhara "I". However, in some cases, significant public interests can transform prohibited Fiqh rulings that are based on Sadd al-Dhara "I" to allowed Fiqh rulings in Maliki and Hanbali school of thought.
Harith M. Issa
Excuse, Interest, Preponderant.