18. We have absolved you from the requirement of performing the Prayer of the Signs. [#11]
The Prayer of the Signs is a special form of Muslim obligatory prayer that was ordained to be said in times of natural events, like earthquakes, eclipses, and other such phenomena, which may cause fear and are taken to be signs or acts of God. The requirement of performing this prayer has been annulled. In its place a Bahá’í may say, "Dominion is God’s, the Lord of the seen and the unseen, the Lord of creation," but this is not obligatory (Q and A 52).
19. Save in the Prayer for the Dead, the practice of congregational prayer hath been annulled. [#12]
Congregational prayer, in the sense of formal obligatory prayer which is to be recited in accordance with a prescribed ritual as, for example, is the custom in Islám where Friday prayer in the mosque is led by an imám, has been annulled in the Bahá’í Dispensation. The Prayer for the Dead (see note 10) is the only congregational prayer prescribed by Bahá’í law. It is to be recited by one of those present while the remainder of the party stands in silence; the reader has no special status. The congregation is not required to face the Qiblih (Q and A 85).
The three daily Obligatory Prayers are to be recited individually, not in congregation.
There is no prescribed way for the recital of the many other Bahá’í prayers, and all are free to use such non-obligatory prayers in gatherings or individually as they please. In this regard, Shoghi Effendi states that
...although the friends are thus left to follow their own inclination, ... they should take the utmost care that any manner they practise should not acquire too rigid a character, and thus develop into an institution. This is a point which the friends should always bear in mind, lest they deviate from the clear path indicated in the Teachings.