How similar are the rules of the ‘Stability and Growth Pact’ of the ‘Euro’ area of the European Union to the rules and conventions governing the working of the gold standard?

How similar are the rules of the ‘Stability and Growth Pact’ of the ‘Euro’ area of the European Union to the rules and conventions governing the working of the gold standard? Why are such rules considered necessary for fixed exchange rate regimes?•Any clear referencing style is acceptable, including web references.N