The vast majority of cities in texas are incorporated communities, have a population of 5,000 or less, and are limited in the subject matter on which they may legislate. these cities are known as

These cities are known as General Law Cities

Explanation:

The name General comes from the fact that these cities are ruled under the general laws of the state, in this case, general Texas law, and not under specific municipal laws. These gives general law cities very limited power. They cannot raise taxes, they cannot add additional charges in utility bills in order to finance public services such as the police or education, and they practically cannot impose bans.

b) to encourage free trade