In his introduction to Mishne Torah Hilkhot Pesach, Maimonides lists and describes a total of eight biblical Mitzvot related to Pesach. This list does not include the Mitzvot related to the Pesach sacrifice (Korban Pesach).
There are three positive commandments and five prohibitions related to Pesach.
Three Positive Commandments:
AKHILAT MATZA 1. The first biblical positive commandment is to eat Matza on the first night of Pesach. In the Diaspora, this obligation automatically extends to include the second night of the holiday. For the rest of Pesach, it is forbidden to eat Chametz, but there is no formal obligation to eat Matza.
2 VEHIGADTA LEBINKHA. The second positive commandment is to tell our children the story of our slavery in Egypt and our miraculous redemption during the first night of Pesach. We do this during the Seder (once in Israel and twice in the diaspora). This story is narrated and explained in the Haggada of Pesach. This Mitzva includes many other Mitzvot and traditions, such as drinking the four cups of wine, eating the maror, etc.
3 HASHBATAT CHAMETZ. The third positive Mitzva is renouncing the possession of our Chametz on the eve of Pesach, that is the 14th of Nisan before noon
Five Biblical Commandments:
4 ISUR AKHILAT CHAMETZ. The first prohibition is that of eating Chametz during Pesach (the next section defines Chametz). This prohibition also includes se-or, or natural yeast.
5 ISUR AKHILAT TAAROBET CHAMETZ. The second prohibition is against eating any food containing Chametz or a combination of Chametz during Pesach. The Gemara mentions as examples of food containing Chametz the Kutah haBabli, a type of cottage cheese (cottage= כותח?) which contained bits of bread, and shekhar haMadi, an alcoholic beverage made from grain, like beer.
6 BAL YERAE. The third prohibition is that of owning Chametz during Pesach. This prohibition takes effect regardless of where the Chametz is found.
7. BAL YIMATZE. The fourth prohibition is of owning Chametz during Pesach. This and the previous prohibition are in fact identical, there is no difference between them, and they apply in exactly the same way. This is an exceptional case in the entire Tora.
8 ISUR AKHILAT CHAMETZ BE’EREB PESACH ACHAR CHATZOT: The fifth prohibition is that of eating Chametz from noon on Pesach eve. The rabbis extended this prohibition to two hours before noon, meaning Chametz can only be consumed until the end of the fourth hour of the day.
