The PSA is the national registry and mandated by law to keep and preserve CRDs (also called "PSA certificates"). The PSA replaced the former national authority, which was the National Statistics Office (NSO). The PSA continues to issue both PSA and NSO certificates, as neither type of certificate expires.
The layouts, details, and contents of both the NSO and PSA certificates are the same, except for the logo found on the upper left corner of the document that shows either "NSO" or "PSA." Also, the PSA certificates have updated security features.
Although the PSA keeps most CRDs, their database is incomplete. Therefore, some records may only be at LCROs.