Hazal have established various laws of mourning that are in force during the Three Week Period — they intensify in stringency the closer we get to Tishah B’Av. They are subdivided as follows:

1. בין המצרים — Halachot that apply during the entire three week period from the seventeenth of Tammuz through Tishah B’Av. (See pages 30-32).

2. Additional stringencies that apply from Rosh Hodesh Av until after the ninth of Av. (See pages 35-39).

3. Laws that are in force during the week in which Tishah B’Av falls. (See pages 43-46).

4. Erev Tishah B’Av — laws for Erev Tishah B’Av after hatzot, midday. (See pages 48-51).

5. Tishah B’Av itself. (See pages 54-63). 

6. The tenth of Av. (See page 66).

Each of these will be discussed.