In order to protect the interest of the consumers the government imposes price ceiling or maximum price above which no one will sell the commodity. This is called 'price ceiling' or 'maximum price legislation'. Price Legislation. Whenever the forces of demand and supply are allowed to fix market prices of commodities in a competitive market, some of the prices may be unfairly high to buyers or unfairly low to sellers. In such instances, the government may attempt to regulate or limit prices through legislation. Definition – A maximum price occurs when a government sets a legal limit on the price of a good or service – with the aim of reducing prices below the market equilibrium price. ... If the maximum price is set below the equilibrium price, it will cause a shortage – demand will be greater than supply. Price ceiling (maximum price) – the highest possible price that producers are allowed to charge consumers for the good/service produced/provided set by the government. It must be set below the equilibrium price to have any effect.