The paper addresses the interpretation of the concept of local law issued by local gov- ernment, included in the Constitution of the Republic of Poland of 2 April 1997. Local law of territorial self-government, against authorizations of other law-making organs, features a broad spectrum of possibilities, from implementing acts to legislation differ- ent than statute, which depends on a specific statutory authorization that must carry out the constitutional principle of decentralization of public power under Article 15 and the principle of transferring to the local government of a substantial part of public du- ties under Article 16.