In the industry, it is normal to follow many standards that are equivalent to each other.
In Malaysia, we have SIRIM and Singapore SISIR. We used to follow BS (British Standard) long ago and later SI (International Standard). (Which further develope into IEC.) Of course there are many country who have their own standard which are similar to each other like JIS, VIN, ASEC, TUV, DIN.
I know most reputable manufacturer of brake have published specification of their product and will also state the compliance to known standard.
let hope that the authority will clarify this matter.
Meantime, let hope that most importer of brake pads should apply for approval or acknowledgment that their product complied to SIRIM MSI 164 standard.
IMHO, it about time we strictly enforced all this countermeasure to ensure the safety of the ALL road user.