DTI PNS/UN ECE 22:2007 (UN ECE PUBLISHED 2002) ICS 43.040.01, August 20, 2009
UNIFORM PROVISIONS CONCERNING THE APPROVAL OF PROTECTIVE HELMETS AND THEIR VISORS FOR DRIVERS AND PASSENGERS OF MOTOR CYCLES AND MOPEDS
National Administrative Register August 20, 2009
Text Available at Office of the National Administrative Register, U. P. Law Complex, Diliman, Quezon City