The public obligations of the population towards the Roman community were dictated by fides, by honesty based on religious belief common to all nations, that the obligations must be fulfilled. From the ancient times there was also a rule that the public rights and duties of a Roman citizen are dependant on his economic power. This rule was later introduced in provinces, along with a demand that the peregrin who intended to be a member of the city council must have a building in the city and he needed also the persons who would guarantee for the fulfillment of his obligations towards the Empire. The peregrins already heavily burdened by taxation during the period of the Republic and Principate, were obliged to confess under the oath the property and the members of their families. As a guarantee for the payment of public debts the whole present and future property of the tax-payer was charged by pledge, with the priority right in favour of the Roman treasury. In the Late Roman Empire, after when the Roman citizenship was given to the whole population of the Empire (212 AD) and after the introduction of uniform taxation, this practice was applied to its entire territory. From the beginning of the 3rd century because of economic crises, wars, and devastations of barbarian nations, however, the demands of the citizens for exemptions of public charges became a frequent problem. Having in mind that these demands were often unfounded, sometimes even extorted, the emperors have regulated the benefice of remission of fiscal debts by particular laws. Fighting against unjust claims for privileges of landowners (potentiores), corruption and various other frauds concerning fiscal interests of the Empire, on the other hand, the emperors gave remission of delinquent taxes to the population, if the reason for it they find justified. Their decisions relied on the ancient rule, that the public charges depend on the economic power of the citizen, with the argumentation: `In whatever degree any person is of more honored rank or richer, so much the more does he owe a more eager spirit toward his compulsory public services whose performance he knows will be the more profitable to him.` (Nov. Val. 10, 3) [ABSTRACT FROM AUTHOR]