Hi Shrishaila,
You do not need to worry about the CT0003 rule if you do not use AGESPAN parameter in TS domain AND version of CDISC CT 2013-04-12 of later.
As of today a majority of users is still using previous versions of CDISC CT. Therefore there are no plans to phase out the CT0003 check at this moment.
The CT0003 check is not expected to be executed in your case when ‘Age Span’ (C66780) codelist is not present in CT version you use. Do you have any particular problem with false-positive messages?
Thank you,
Sergiy