Kekuatan Hukum Akta Pernyataan dan Akta Kuasa Kepemilikan Tanah Dibandingkan dengan Sertipikat Hak Milik (Studi Kasus Putusan Mahkamah Agung Republik Indonesia Nomor 691 Pk/Pdt/2022) = The Legal Strength of Deeds of Declaration and Deeds of Power of Attorney for Land Ownership Compared with Certificates of Ownership (Case Study of the Supreme Court Decision of the Republic Indonesia Number 691 PK/Pdt/2022)