1.	Recitation of the Short Obligatory Prayer at meetings.
"Regarding the use of the Obligatory Prayers..., it is clear that when any of these three prayers is to be performed as a prescribed daily Obligatory Prayer, the worshipper is required to follow the instructions that accompany that prayer. Although there is no explicit prohibition on the use of these prayers, wholly or in part, as regular prayers without any genuflections, to open or close a meeting or fireside, it is preferable for the friends not to follow such a practice. Baha'is have so many other beautiful prayers revealed by the Twin Manifestations and 'Abdu'l-Baha for such meetings."
2.	Substitution of "daughter of" for "son of"
"With respect to your question as to whether it is ermissible for a female in reciting the Long Obligatory Prayer to say, "I am Thy handmaiden, O my Lord, and the daughter of Thy handmaiden", you are correct in your understanding that the Guardian did not wish Baha'is to change the gender of pronouns and nouns in the revealed prayers. The following excerpt from a letter dated 14 January 1947 written on his behalf makes this clear:"
The National Spiritual Assembly observes that in the Long Obligatory Prayer, there are three occasions on which one has to repeat the Greatest Name three times. While it is clear that, on the first occasion, the believer has to raise his or her hands once and repeat the Greatest Name three times, the National Assembly enquires whether it is also necessary to raise one's hands on1 the other two occasions.
1. Baha'i Prayers: A Selection of Prayers Revealed by Baha'u'llah, the Bab, and 'Abdu'l-Baha (Wilmette: Baha'i Publishing Trust, 1993), p. 10; 14 and 15.