Department Administrative Order (DAO) No. 18-08, Series of 2018
The New Technical Regulations Concerning the Mandatory Product Certification of Deformed Steel Bars, Rerolled Steel Bars and Equal Leg Angle Steel Bars

Memorandum Circular 19-04, Series of 2019
Supplemental Guidelines for the Implementation of DAO 18-08, Series of 2018

Memorandum Circular 19-09, Series of 2019
Supplemental Guidelines for the Implementation of DAO 18-08, Series of 2018

Memorandum Circular 20-48, Series of 2020
Supplemental Guidelines for the Implementation of DAO 18-08, Series of 2018

Memorandum Circular 21-07, Series of 2021
Supplemental Guidelines for the Implementation of DAO 18-08 Series of 2018