Masigla Waterways Corporation applied for a certificate of title over a 1.5-kilometer stretch of the Pasig River and its riverbed in Pasig City. In support of its application, Masigla presented a deed of sale executed in 1910 by a private vendor, tax declarations in its name dating back to 1925, and evidence of uninterrupted possession of the property for over a century. The Republic of the Philippines, through the Office of the Solicitor General, opposed the application, invoking the Regalian Doctrine. Masigla countered that the 1910 deed and more than 100 years of continuous possession should ripen into a registrable private title under the law. Should Masigla's application for a certificate of title be granted? (Bar 2026 Syllabus)