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5Article 309
The share of a co-owner by shares in the immovable or movable property shall be determined according to his capital contribution where there is no agreement or the agreement is unclear. Where it is impossible to determine the amount of capital contribution, each co-owner by shares shall be entitled to an equal share.
Article 310
Where two or more organizations or individuals are jointly entitled to a right to usufruct or a security interest, the relevant provisions of this Chapter shall be applied mutatis mutandis.
Chapter IX Special Provisions on the Acquisition of Ownership
Article 311
Where a person with no right to dispose of an immovable or movable property transfers it to another person, the owner has the right to recover it; unless otherwise provided by law, the transferee acquires the ownership of the immovable or movable property under the following circumstances:
(1) the transferee is in good faith at the time when the immovable or movable property is transferred to him;
(2) the transfer is made at a reasonable price; and
(3) the transferred immovable or movable property has been registered as required by law, or has been delivered to the transferee where registration is not required.
Where a transferee acquires the ownership of the immovable or movable property in accordance with the provisions of the preceding paragraph, the original owner has the right to claim damages against the person who disposes of the property without a right.
Where a party acquires, in good faith, a real right other than ownership, the provisions of the preceding two paragraphs shall be applied mutatis mutandis.
Article 312
An owner or any other right holder has the right to recover a lost thing. Where the lost thing is possessed by another person by way of transfer, the right holder has the right to claim damages against the person who disposes of the thing without the right to disposition, or to request the transferee to return the original thing within two years from the date on which the right holder knows or should have known of the transferee, provided that where the transferee has acquired the lost thing at auction or from a qualified business operator, the right holder shall, at the time of requesting the return of the original thing, reimburse the expenses that have been paid by the transferee. The right holder has, after having reimbursed the expenses paid by the transferee, the right to indemnification against the person who disposes of the thing without the right to disposition.
Article 313
After a bona fide transferee acquires the movable property, the original rights in the movable property is extinguished, unless the bona fide transferee knows or should have known of such rights at the time of the transfer.
Article 314
Where a lost thing is found, it shall be returned to its right holder. The finder shall, in a timely manner, notify its right holder or hand it over to the relevant departments such as the department for public security.
Article 315
Where the relevant department receives a lost thing and knows who is its right holder, the department shall, in a timely manner, notify him to collect the lost thing; where the department does not know who is the right holder, it shall issue a lost-and-found notice in a timely manner.
Article 316
A finder shall well keep a lost thing before it is delivered to the relevant department, and the relevant department shall well keep it before it is collected. A person who, intentionally or by gross negligence, causes the lost thing in his custody to be destructed, damaged, or lost shall bear civil liability.
Article 317
The right holder of a lost thing shall, at the time of collecting it, pay to the finder or the relevant department the necessary expenses, such as the expense for safekeeping the lost thing.
Where a right holder has offered a reward for finding the lost thing, he shall, at the time of collecting the lost thing, perform his obligations as promised.
Where a finder misappropriates the lost thing, he is neither entitled to request reimbursement of expenses such as the expense for safekeeping the lost thing, nor entitled to request the right holder to perform the obligations as promised.
Article 318
Where a lost thing has not been claimed by anybody within one year from the date the lost-and-found notice is publicized, the lost thing is to be escheated to the State.
Article 319
Where a drifting thing is found or a thing buried underground or hidden is discovered, the provisions relating to the finding of lost things shall be applied mutatis mutandis, unless otherwise provided by law.
Article 320
Where a principal thing is transferred, the accessary thereof shall be transferred concomitantly, unless otherwise agreed by the parties.
A person with the right to contractual management of land may decide on his own to transfer the right to management of land to others by leasing, contributing it as shares, or other means in accordance with law.