FWIW you can find the info in 1149/2011
Article 7 point 8 as follows:
‘8. For the purpose of time limits contained in points 66.A.25, 66.A.30 and Appendix III of Annex III (Part-66) related to basic knowledge examinations, basic experience, theoretical type training and examinations, practical training and assessment, type
examinations and on the job training completed before this Regulation applies, the origin of time shall be the date by which this Regulation applies.
so this one kicked in 31 July 2012 and the 10 Years for Basic Certs gives you 31 July 2022
for type certs/OJT was July 2015