Yes births within the past 100 years are not accessible on-line. They are open to the public but with a couple of exceptions, you can't search them on-line. The exceptions are if you go to either GRONI or PRONI in Belfast in person. If that's not practical, then you can ring GRONI and pay them to search for you. There's a search fee for every 5 years, plus the cost of the certificate if one is found. You pay over the phone, by credit card. Can't be done by post or e-mail as you need to be on the phone to type in your credit card number.