A SERMI certificate is valid for a period of 5 years. However, each Conformity Assessment Body (CAB) is allowed to issue the certificate up to 2 months before the official country implementation date.
The extra 2 month window allows each CAB to onboard users smoothly in advance of the official implementation date. For example, if the implementation date is 1st July, certificates can be issued starting from 1st May without impacting the 5-year validity period.