VII. Philippine National Railways (PNR) operates the rail transport of passengers and goods by providing train stations and freight customer facilities from Tutuban, Manila to the Bicol Province. As the operator of the railroad transit, PNR administers the land, improvements and equipment within its main station in Tutuban, Manila. Invoking Section 193 of the Local Government Code (LGC) expressly withdrawing the tax exemption privileges of government-owned and controlled corporations upon the effectivity of the Code in 1992, the City Government of Manila issued Final Notices of Real Estate Tax Deficiency in the amount of P624,000,000.00 for the taxable years 2006 to 2010. On the other hand, PNR, seeking refuge under the principle that the government cannot tax itself, insisted that the PNR lands and buildings are owned by the Republic. Is the PNR exempt from real property tax? Explain your answer. (5%)