Section 1413 — Superficies — transfer and inheritance
Statutory text (Thai original)
ถ้าสิทธิเหนือพื้นดินนั้นไม่มีกำหนดเวลาไซร้ ท่านว่าคู่กรณีฝ่ายใดจะบอกเลิกเสียในเวลาใดก็ได้ แต่ต้องบอกล่วงหน้าแก่อีกฝ่ายหนึ่งตามสมควร ถ้ามีค่าเช่าซึ่งจำต้องให้แก่กันไซร้ ท่านว่าต้องบอกล่วงหน้าปีหนึ่ง หรือให้ค่าเช่าปีหนึ่ง
Verbatim from the Royal Gazette / Office of the Council of State
English translation
If no period of time has been fixed, the right of superficies may be terminated at any time by any partner giving reasonable notice to the other. But when rent is to be paid, either one year's previous notice must be given or rent for one year paid.
This English translation is provided for reference only and has not yet been firm-verified — always rely on the Thai original.
Firm annotation
Section 1413 makes superficies more valuable than usufruct or habitation: it can be sold, mortgaged (with consent of landowner), and inherited. The deed can restrict transfer, but absent restriction, the superficies is a tradeable asset. For estate-planning purposes, this means a foreign client's house (held under registered superficies) can be devised by will to children — unlike a usufruct, which would extinguish at the client's death.