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The legalities of the GDR being valid for the protection against noise demand an obligatory classification of the municipal areas with different limits. These limits are comprised compulsory in the GDR-Standard TGL39617 - Protection against Noise; Limits of Noise Immission in Communal Reach. The organs of state and economy have to guarantee observing these limits. The classification of the municipal areas is difficult, because the architects plan the general land use with respect economic points of view, contrary to the organs of hygiene witch have regard to the localisation of the noise sources. The authors propose possibilities to the introduction of steps of save load against noise and to further subdividing of the structure from noise limits.