Here are the list of Service Contractors and Subcontractors in Central Luzon:
D.O. 174 - A >
D.O. 174-17 (Issued 2017 and Expires 2020)
D.O. 174-17 (Issued 2016 and Expires 2019)
Notice of Expired and Expiring Certificates of Registration Under D.O. 174-17 and D.O. 18-A , For Renewal in 2017, Expired D.O. 18-A as of April 27, 2017