Limitations are printed on your licence, for example, No Electrics or No Avionic LRU.
These would be applied as limitations to type ratings you hold, and you'd be given an authorisation by QA as appropriate. B737 CFM56 - No Avionic LRU for example.
You cannot add/make up limitations for type ratings you do not hold.
Your A320 (V2500) might aswell be an Embraer 145 as far as giving you any release privileges on an A320 (CFM56) is concerned, they are different type ratings.
Last edited by T.R Haychemu; 25th Nov 2012 at 15:10.