In chapter 12 of the book of exodus, god gave moses some specifications for the celebration of the passover. name three of these specifications.

-- Four days before the celebration of the Passover begins, each family is to dedicate a one-year-old sheep or goat as its Passover offering.

--  On the night when the festival begins, each family must roast their animal on open fire, then eat it, completely, with unleavened bread and bitter herbs.

-- On the anniversary of this occasion, in all the years to come, there shall be no leavened products visible or in the possession of a family for seven days.  During that time, when bread is eaten, it must be unleavened bread only.

-- In every year, at the beginning of the festival, on the exact anniversary of the night when the Exodus from Egypt began, parents must teach their children what it's all about, and repeat the story of the Exodus for them.