Transfering duties customarly designated for public entities to private entities is a fact. It is connected with delegating on them a part of legal power in creating rights and duties of individuals. A vast majority of their domineeringly will is commonly stated on the grounds of by-laws. By-laws have different form, content and even different function. At the same time, depending only on the will of private entities several times interfere in the freedom and the rights of their addressee. That is why scientifical research concerning their essence and content, including a progressive and complicated process of “privatisation of public safety” seem to be more and more important. On the ground of this research, several by–laws laid down by private entities are being analysed.