Halacha 1
Moses, our teacher, ordained that the Jews should read the Torah publicly on the Sabbath and on Monday and Thursday mornings, so the [people] would never have three days pass without hearing the Torah.
Ezra ordained that [the Torah] should be read during the Minchah service on the Sabbath, because of the shopkeepers. He also ordained that on Mondays and Thursdays, three people should read [from the Torah], and that they should read no fewer than ten verses.
Halacha 2
These are the days when the Torah is read publicly: Sabbaths, festivals, Rashei Chadashim, fast days, Chanukah, Purim, and Mondays and Thursdays each week.
The haftarah is read only on Sabbaths, festivals, and Tish'ah B'Av.
Halacha 3
The Torah is never read in public in the presence of fewer than ten adult free men. No fewer than ten verses are read. Vayedaber is counted as one of them. No fewer than three men should read.
[When] beginning a passage from the Torah, [one should read] at least three verses, and one should not conclude less than three verses from the conclusion of a passage. Each reader should not read fewer than three verses.
Halacha 4
[When] three people read ten verses: Two read three [verses each] and one, four [verses]. It is praiseworthy regardless of whether the one who read four [verses] is first, last, or in the middle.
Halacha 5
Each one of the readers opens the Torah scroll and looks at the place from which he is to read. Afterwards, he declares, Barchu et Ado-nai hamevorach, and all the people answer: Baruch Ado-nai hamevorach le'olam va'ed. He then recites the blessing:
Blessed are You, God, our Lord, King of the universe, who has chosen us from among all the nations and given us His Torah. Blessed are You, God, the Giver of the Torah.
All the people respond: "Amen." Afterwards, he reads until he completes the reading, rolls the scroll [closed] and recites the blessing:
Blessed are You, God, our Lord, King of the universe, who has given us His Torah, the Torah of truth, and implanted eternal life in our midst. Blessed are You, God, the Giver of the Torah.
Halacha 6
The person reading the Torah is not allowed to begin reading until the congregation ceases responding "Amen." If one erred while reading, even regarding the careful pronunciation of one letter, [the reader] is forced to repeat [the reading] until he reads it correctly.
Two people should not read at the same time. Rather, one should read alone. If one was reading and lost the ability to speak, another should replace him. He should begin from the place where the one who lost the ability to speak began, and recite the blessing after concluding.
Halacha 7
The reader is not permitted to [begin] reading until the person of greatest stature within the community tells him to [begin] reading. Even the chazan or the gabbai should not begin reading on their own initiative until the community [as a whole] or the person of greatest stature begins to read.
[When the chazan reads from the Torah,] another person should stand with him while he reads, just as the chazan stands together with the other readers.
Halacha 8
The reader may skip from place to place in one subject - for example, from Acharei mot... to Ach be'asor, in the portion Emor el Hacohanim - provided he does not read by heart. It is forbidden [for a reader] to say even one word [without looking at the text]. [When] skipping [in this fashion, the reader] should not wait longer than it takes for the translator to translate one verse.
Halacha 9
Once the reader begins reading the Torah, it is forbidden [for the congregants] to talk, even regarding matters of Torah law. Rather, everyone should listen, remain silent, and pay attention to what is being read, as [Nechemiah 8:3] states: "The ears of all the people were [attentive] to the Torah scroll."
It is forbidden to leave the synagogue while the reader is reading from the Torah. However, one is permitted to leave between aliyot. A person who is constantly involved in Torah study, and Torah is his occupation, is permitted to involve himself in Torah study while the Torah is being read.
Halacha 10
From the time of Ezra, it was customary that a translator would translate to the people the [passages] read by the reader from the Torah, so that they would understand the subject matter.
The reader should read one verse alone and remain silent while the translator translates it. Afterwards, he should read a second verse. The reader is not permitted to read to the translator more than one verse [at a time].
Halacha 11
The reader is not permitted to raise his voice above that of the translator, nor should the translator raise his voice above that of the reader. The translator is not permitted to [begin] translating until the reader completes reading the verse, nor may the reader [begin] reading another verse until the translator has completed the translation.
The translator should not lean on a beam or on a pillar. Rather, he should stand with awe and fear. He should not translate from a written text, but rather should recite the translation by heart.
The reader is not permitted to assist the translator, lest people say: "The translation is written in the Torah scroll." A person of lesser stature may serve as a translator for a person of greater stature. However, it is not befitting the honor of a person of greater stature to serve as a translator for a person of lesser stature. Two people should not serve as translators simultaneously; rather, one person should read and one should translate.
Halacha 12
Not all passages from the Torah are translated in public. All [of the following passages] should be read, but not translated: the incident involving Reuven, the priestly benediction, [the passage describing the sin] of the golden calf from "And Moses told Aharon" (Exodus 32:21) until "And Moses saw the people" (Exodus 32:25) and one other verse, "And God set a plague upon the people" (Exodus 32:35).
In the [description of] the incident concerning Amnon (II Samuel, Chapter 13), the verse which states, "Amnon, the son of David" (13:1) should be neither read nor translated.
Halacha 13
The person who reads the haftarah must read from the Torah first. Even three verses [are sufficient]. He should read again the passage that had been read previously.
He should not [begin] reading the haftarah until the Torah scroll has been rolled closed. He should not read fewer than twenty-one verses [as the haftarah]. However, if a concept is completed in fewer [verses] than that, he need not add more. If he read only ten verses, but the haftarah is translated, it is sufficient even if the concept is not completed.
[When reading] from the prophets, one reads and even two may translate. One may skip from one concept to another. However, one should not skip from one prophet to another, except among the twelve prophets. Furthermore, [even within a book from a single prophet,] one should not skip from the conclusion of the book until its beginning. Whenever one skips, one should not wait longer than it takes the translator to complete his translation.
Halacha 14
A person reading from the prophets may read three verses to the translator at one time, and the translator translates them one after another. If the three verses are three separate passages, [the reader] should read them to the translator only one at a time.
Halacha 15
The person who reads the haftarah recites one blessing before [beginning his reading]: Blessed are You, God, our Lord, King of the universe, who chose prophets....
After [completing the reading], he recites four blessings. He concludes the first blessing: "the God who is faithful in all of His words." He concludes the second blessing: "who builds Jerusalem." He concludes the third blessing: "the Shield of David." He concludes the fourth blessing with the mention of the sacred aspect of the day, as he does in the Shemoneh Esreh. Similarly, if Rosh Chodesh falls on the Sabbath, the one who reads the haftarah mentions Rosh Chodesh in this blessing, as he does in the Shemoneh Esreh.
Halacha 16
How many readers [are called to the Torah]? On Sabbath morning, seven; on Yom Kippur, six; on festivals, five. This number may not be reduced. However, it may be increased.
On Rashei Chadashim and on Chol Hamo'ed, four people [are called to read [from the Torah]. On the Sabbath and Yom Kippur during the Minchah service, on Mondays and Thursdays throughout the entire year, on Chanukah and Purim in the morning service, and on fast days in the morning and Minchah services three people [are called to] read [from the Torah]. This number may not be reduced, nor may it may be increased.
Halacha 17
A woman should not read the Torah publicly, as a token of respect for the community. A minor who knows how to read and is aware of the One who is being blessed may be counted as one of the required number [of people called to the Torah].
Similarly, the one who recites the haftarah is counted as one of the required number [of people called to the Torah], because he also reads from the Torah. [However,] if the leader of the congregation interrupted [by reciting] Kaddish between the conclusion of the Torah reading and the reading of the person who recites the haftarah, [the latter] is not included as one of the required number [of people called to the Torah].
If there is only one person in the community who knows how to read [from the Torah], he should be called to the Torah, read, descend [from the platform], return and read again a second and a third time until he completes the number of aliyot designated for that day.
Halacha 18
In all of these [Torah] readings, a priest reads first; after him, a Levite; and after him, an Israelite. It is common custom at present that even a priest who is a common person is given precedence and allowed to read before a wise man of great stature in Israel.
Whoever is greater than his colleague in wisdom is given precedence regarding the reading [of the Torah]. The last person who rolls the Torah scroll closed receives a reward equivalent to that of all the others. Therefore, even the person of the greatest stature in the community can receive the concluding aliyah.
Halacha 19
When there are no priests present, an Israelite is called to the Torah and a Levite should not be called after him at all.
When there are no Levites present, the priest who received the first aliyah returns and reads [from the Torah] a second time in place of the Levite. Another priest should not read [from the Torah] after him, lest others say that there is a blemish in the first's lineage, and, therefore, another priest was given the aliyah.
Similarly, one Levite should not read [from the Torah] after another Levite, lest others say that there is a blemish in the lineage of one of them.
Halacha 20
What is the order [of the service] when the Torah is read after prayer? On a day when there is a Musaf service, after the leader of the congregation completes the morning service, he recites Kaddish and takes out the Torah scroll. He calls the members of the community, one by one, and they ascend and read from the Torah. When they have completed the reading, he returns the Torah scroll to its place, recites Kaddish, and then the [congregation] recites the Musaf service.
On days when the haftarah is read and there is a Musaf service, it is customary to recite Kaddish before the person who reads the haftarah ascends [for his aliyah]. There are places where it is customary to recite Kaddish after the person who reads the haftarah [completes his Torah reading].
Halacha 21
During the Minchah service on the Sabbath and on Yom Kippur, after the leader of the congregation completes Tehillah l'David and the order of Kedushah, he recites the Kaddish, and takes out a Torah scroll. [Those called to the Torah] ascend and read and then, [the Torah scroll] is returned [to its place. The leader of the congregation] recites Kaddish, and the [congregation] recites the Minchah service.
Similarly, on a fast day, the Torah is read [before] the Minchah service. Afterwards, Kaddish is recited, and the Minchah service is recited. On festivals, it is not customary to read [the Torah] in the Minchah service.
Halacha 22
[When the Torah is read on] a day when Musaf is not recited, after the morning Shemoneh Esreh is completed, [the leader of the congregation] recites the Kaddish and takes out a Torah scroll. [After the portion is] read from it, [the Torah scroll] is returned [to its place. The leader of the congregation] recites Tehillah l'David and the order of Kedushah, as is the practice every day. [Afterwards,] he recites the Kaddish and the people depart.
Halacha 23
It is not proper to read from chumashim in synagogues, as a token of respect for the community.
A Torah scroll should not be rolled [from one portion to another portion] in the presence of the community, because of the difficulty it would cause the people, forcing them to remain standing while the Torah scroll is being rolled. Therefore, if it is necessary to read two separate concepts, two Torah scrolls are taken out. [However,] one person should not read one concept from two Torah scrolls, lest people say that the first scroll was invalid and, therefore, they read from the second.
Halacha 24
When a person rolls a Torah scroll [closed], he should roll it from the outside. When he ties it, he should tie it from the inside. He should leave the stitching [in the center], so that it will not rip.
In a place where a Torah scroll is taken [from the synagogue] to another room where it is kept, the congregation is not allowed to leave until the Torah scroll is taken. They should accompany it, following it to the place where it is kept.
Moses, our teacher, ordained that the Jews should read the Torah publicly on the Sabbath - See also Chapter 13, Halachah 8.
and on Monday and Thursday - Tosafot, Bava Kama 82a relates that these days are days of Divine favor.
mornings - The Mishnah Berurah 135:1 states that, although ideally the Torah should be read in the morning service, if one fails to do so, it may be read the entire day.
so the [people] would never have three days pass without hearing the Torah. - Bava Kama 82b quotes Exodus 15:22: "And they travelled three days without finding water," and explains:
Water refers to the Torah, as [implied by Isaiah 55:1]: "May all the thirsty go to the water." Since they travelled three days without Torah, they complained. The prophets among them arose and ordained that they read [Torah] on the Sabbath, refrain [from reading] on Sunday, read on Monday, refrain [from reading] on Tuesday and Wednesday, read on Thursday, and refrain from reading on Friday, so that they will not spend three days without [reading from] the Torah.
Ezra ordained that [the Torah] should be read during the Minchah service on the Sabbath, because of the shopkeepers. - The Hebrew, יושבי קרנות, literally means "those who sit on the street corners." Our translation is based on Rashi's commentary (Bava Kama, loc. cit.). He explains that during the week, these people were involved with their businesses and could not attend the Torah reading. Therefore, Ezra instituted a special Torah reading for them on the Sabbath, when work is prohibited.
Rav David Arameah interprets the phrase literally, explaining that on the Sabbath, since work is prohibited, people would gather in the afternoon in the marketplace, and spend their time in idle conversation. Therefore, Ezra ordained the public Torah reading to draw them into the synagogue.
He also ordained that on Mondays and Thursdays, three - Megillah 21b relates that the number three reflects the three divisions among the Jewish people: priests, Levites, and Israelites; alternatively, the three divisions in the Written Law (the Torah, Prophets, and Holy Writings).
people should read - In Talmudic times, the person called to the Torah would read from the Torah himself. Our custom of having one reader is discussed in the commentary on Halachah 17.
[from the Torah] - Bava Kama (loc. cit.) explains that originally either one person would read three verses, or three people would read three verses.
and that they should read no fewer than ten verses. - Megillah (loc. cit.) states that the ten verses allude to the ten commandments and the ten utterances of creation; alternatively, they represent the ten people who attend a synagogue at all times. (See Halachah 3.)