An accessory means it in case the owner of the object attaches another object belonging to him in order to continue using the object. As a rule, subordinate goods follow the disposal of the main goods. Therefore, the second thing means that another thing owned by the owner of the thing is attached to it, and if a thing belonging to another person is attached to the main thing, it cannot be a second thing in principle. If there is a disposition for a principle property and a public disclosure method is provided, there is no change in property right to the specific product even if a separate disclosure method is not provided for the specific product. Since the dependence on a principle property is weak, a separate public disclosure method must be provided for the principle property to cause a change in property rights. There is a limit to regulating new legal acts, which are special transactions, with the existing system in the reality that new legal acts are generated and activated due to human culture and economic development following the development of science and industrial technology. When a legal system suitable for new legal acts and economic development is established, transaction safety will be guaranteed and new legal acts and economic development will take place. In case of property rights, the disclosure method must be prepared to cause the change of the property rights, and according to the theory of property rights, it is not the case, but rights with property rights can be registered. It is necessary to have a procedure for preparing the public disclosure method for the specific product and the public disclosure method for the subsidiary right.