The answer depends on the context. There are rules for sequences, rules for regression, rules for scientific laws to name a few examples.
What was the name of the right granted by the Spanish government to turn Native Americans into slaves was called?
Blue laws
It is generally called the legislative branch of a government. In the US government it is Congress. In the states it is commonly called the legislature. In some countries, as in the United Kingdom, it is Parliament. In other countries it is some other name unique to that country.
Republic
The document that sets out the rules of government is the Australian Constitution.
a monarchy
Not certain what you're asking. The government makes ALL laws.
A constitution is a set of written rules that sets down a plan on how to operate a government.
The mitzvot (Torah-commands).
The state constitution
The vampire parliament in the Twilight series is called the "Volturi." They are a powerful coven of vampires based in Volterra, Italy, who enforce the laws and rules governing the vampire world.