The special contribution created, within the general decentralisation grant, for the establishment and implementation of town planning documents, pursuant to Article L. 1614-9, is intended to compensate for the costs incurred by communes, public establishments for inter-communal cooperation or mixed syndicates in drawing up territorial coherence schemes, sectoral schemes, inter-communal local town planning schemes, local town planning schemes, communal maps, local advertising regulations, and in amending, revising or making compatible these documents or documents governed by land-use plans.