The Initial Testing  Procedure (s) shall fulfil the following requirements:  - The Initial Testing  Procedure  shall be Fit-for-Purpose ; - The Initial Testing Procedure  shall be performed on Aliquot (s) taken from the container identified as the “A” Sample ; [Comment: In cases when the “A” Sample cannot be used for the Initial Testing Procedure (s), the Initial Testing Procedure  may be performed on an Aliquot  of the first bottle of the split “B” Sample, which is to be used as the “A” Sample (see Article  5.3.3.2).]