Textbook P31
The following properties may not be mortgaged (1) land ownership (2) the right to use collectively owned land such as homesteads, self-reserved land, and self-reserved hills, except for those that can be mortgaged as stipulated by the law (3) educational facilities, healthcare facilities, and other facilities of public interest of nonprofit legal persons established for public interest such as schools, kindergartens, and healthcare facilities (4) properties whose ownership or right of use is unknown or disputed (5) properties that have been seized or supervised by laws and administrative regulations. ) property whose ownership or right of use is unknown or disputed (5) property that has been seized, impounded or supervised in accordance with the law (6) other property that may not be mortgaged as stipulated by laws and administrative regulations. Mortgage of movable property, the mortgage shall be established when the mortgage contract comes into effect; without registration, it shall not be used against a bona fide third party.