Is this duff gen from CAA ref the upcoming EASA rule interpetation.?
No, it is not duff gen. The reason that you cannot find the relevant regulation is that it has not yet been published in its final form. It is contained in Part-ARA, which is due for publication later this year (probably March) and is the new name for the former Part-AR, Subpart FCL. The relevant requirement reads:
AR.FCL.220 Procedure for the re-issue of a pilot licence
(a) The competent authority shall re-issue a licence whenever necessary for administrative reasons and:
(1) after initial issue of a rating; or
(2) when paragraph XII of the licence established in Appendix I to this Part is completed and no further spaces remain
(b) Only valid ratings and certificates shall be transferred to the new licence document
Although it is true that the EASA licence is non-expiring, it will require re-issue from time to time and, on each occasion, it will be necessary to ensure that all required ratings and certificates are valid.
The requirements for renewal of expired class, type or instrument ratings will, under the new Regulation, include refresher training and the Authority will require evidence that this has been completed before renewing the rating. The amount of refresher training will be at the discretion of an ATO and will depend on how long ago the rating expired. Details are contained in the relevant AMCs.