Some of the new rules HERE
All cars four years and older must undergo an NCT. The NCT due date is calculated by reference to the date of first registration of the car with tests due every two years for cars younger than 10 years.
Annual NCT for cars 10 years and older commencing 1st June 2011. This means that all cars presented for their 10th anniversary or subsequent NCT on or after 1st June 2011 will receive a certificate valid for up to one year only
Remember: your NCT certificate will expire after the registration anniversary date regardless of when you take the test so there is no advantage in delaying it.
The following chart will help you determine what year your vehicle is due in for its NCT.
More Info HERE.