Thank you for the very informative reply.
So, to put it in perspective, Norin O'Sullivan, who was promoted to Garda Commissioner in 2014 and retired from her position in 2017, will have a pension of 50% of the salary she was on at that time as opposed to the
new pension scheme.
As I believe, a public servant must reside in the new post for 3 years to avail of getting the pension of 50% of the salary.