You can do this by aptitude test or adaptation period.
An aptitude test is the completion of an examination that addresses the shortfalls identified.
An adaptation period is a period of teaching practice in the identified areas of shortfall under the supervision of a registered member of the profession.
If you are granted conditional registration, the Council will write to you to inform you of the qualification shortfalls on your registration.
For the Irish Language Requirement (ILR) you can find more information at http://www.ilrweb.ie
For the History & Structure (H&S) exam. The aptitude test is held twice a year by the Council. Teachers may apply to sit the examination by emailing email@example.com
For other shortfalls, you must approach colleges yourself to find appropriate courses.