What is considered authoritative among Shafi'is regarding the 'awrah (intimate parts) of a woman outside of prayer?

According to the Shafi'is, the 'awrah of a woman outside of prayer is her entire body except for the face and the hands, and this is also the case during prayer. As for her 'awrah in front of maharim (unmarriageable kin) and women, it is from the navel to the knee. The 'awrah of a free woman during prayer and in front of a non-mahram man is her entire body except for the face and the hands, including their tops and bottoms up to the elbows.