Shaykh Mohammad Bahmanpour presents "The concept of Sunnah in the light of Shia view". Shaykh Bahmanpour provides a definition of the Sunnah of Prophet Muhammad (s) as his words, his practice, and his tacit approval of acts of others. There is a difference between social norms and etiquettes that the Prophet followed as the cultural norms to that era and the Sunnah that he laid out for his community forever.
Then the Shaykh discussed the path to the Sunnah of the Prophet (s);
1. The companions
2. The Imam of Ahlul Bayt (as) The Shia accept both sources as valid and reliable, however, the path to the companions can be unreliable. Then there is the question of who counts as a companion of Prophet Muhammad (s)? The Shaykh discusses the reasons why the Shia do not reply on the hadith books compiled in the second and third century attributing traditions to the companions for several reasons. The Shaykh then discussed the Shia path to the Sunnah and its various aspects.