Decision 24 G.R. No. 215988 the administrative remedy of appeal to the appropriate government agency has been a party or has been made a party in the proceedings wherein the decision to be appealed was rendered. 116 It is not disputed that petitioners were never a party to the application of environmental compliance certificates, both the original and amended, for the Expansion Project. Hence, they were never furnished a copy of the Decision on the Environmental Compliance Certificate, which would trigger the start of the 15-day appeal period provided for under Section 6. IV Petitioners insist that the SM Pines Resort Project and the Expansion Project did not comply with Baguio City's zoning ordinance, contending that they should have been constructed in a C-3 or high-density commerci . iJ zone, not in a C-1 or a low-density commercial zone where it currently is. 117 Petitioners are mistaken. Ordinance No. 51, series of 2001, or the Comprehensive Zoning Ordinance for the City of Baguio 118 (Zoning Ordinance) is intended to "[g]uide, control, and regulate further growth and development of Baguio City in accordance with its Comprehensive Land Use Plan" 119 by providing separate zones for effective and orderly use of land by Baguio residents and visitors alike. It reads: SECTION 5. DIVISION INTO ZONES OR DISTRICTS. To effectively carry out the provisions of this Ordinance, the City is hereby divided into the following land use zones: 1. 2. 3. 4. 5. 6. 7. 8. LOW DENSITY RESIDENTIAL ZONE (R-1) MEDIUM DENSITY RESIDENTIAL ZONE (R-2) HIGH DENSITY RESIDENTIAL ZONE (R-3) SOCIALIZED HOUSING ZONE (SHZ) LOW DENSITY COMMERCIAL ZONE (C-1) MEDIUM DENSITY COMMERCIAL ZONE (C-2) HIGH DENSITY COMMERCIAL ZONE (C-3) GENERAL INSTITUTIONAL ZONE 9. PARKS AND RECREATION ZONE 10. WATER ZONE 11. OTHER ZONES 11.1. PLANNED UNIT DEVELOPMENT 11.1.1. EXPORT PROCESSING ZONE 11.1.2. SPECIAL ECONOMIC ZONE 116 117 118 119 689 Phil. 218, 270 (2012) [Per J. Leonardo-De Castro, En Banc]. Rollo, pp. 33-37. Id. at 236-250. Id. at 236. f