The paper addresses the interpretation of the concept of local law issued by local government, 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 different 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 duties under Article 16.