שולחן ערוך, אורח חיים תקס״ו:ג׳
The leader only says "Anenu" as its only blessing if there are ten fasters in the synagogue. Even if there are ten fasters in the city, if there are not ten in the synagogue, he does not say it.
שולחן ערוך, אורח חיים תקס״ו:ד׳
Some add penitential prayers in the blessing of "Forgive us," and there are those who do not say penitential prayers until the end of the Amidah. This is the practice of the early authorities in Israel, and it is the right practice.
שולחן ערוך, אורח חיים תקס״ו:ה׳
On a communal fast, a prayer leader who is not fasting should not lead.
שולחן ערוך, אורח חיים תקס״ו:ו׳
There are those who say that somebody not fasting should not read from the Torah and if the priest is not fasting, he should leave the synagogue and a non-priest who is fasting should read from the Torah.
משנה ברורה תקס״ו:י״ד
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