A level playing field is a concept about fairness, not that each player has an equal chance to succeed, but that they all play by the same set of rules. A metaphorical playing field is said to be level if no external interference affects the ability of the players to compete fairly.
Government regulations tend to provide such fairness, since all participants must abide by the same rules. Examples of such regulation: building codes, material specifications and zoning restrictions, which create a starting point/a minimum standard — a "level playing field."
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