This is taken directly from Dept of Agriculture & Food website
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Rabies vaccination:
The date of the primary rabies vaccination must not precede the date of identification. This primary vaccination (i.e. first vaccination following identification) must have been administered at least 21 days before arrival in Ireland.
The rabies vaccine must be compliant with the requirements of Regulation (EC) 998/2003 - your veterinary practitioner will advise.
The 21 day period does not apply to revaccinations/booster vaccinations, provided there has been no break in vaccination history. If there has been a break in vaccination, the booster vaccination is considered the primary vaccination and a period of 21 days must have passed since its administration.
Whether the most recent rabies vaccination has been a primary or booster vaccine, it must still be within its 'valid until' date as indicated in the passport.
Vaccination details on the Passport must include name of vaccine, vaccination date and valid until date. Details must be endorsed by a veterinarian by signature and stamp.
Tick & tapeworm treatments:
Echinococcus (tapeworm) treatment applies only to dogs - dogs must be treated not more than 120 hours (5 days) and not less than 24 hours (1 day) prior to scheduled arrival time in Ireland. No Echinococcus treatment is required for dogs travelling directly from another Echinococcus free country - i.e. the Uk, Malta, Finland and Noway.
This tapeworm is not dangerous for the dogs themselves, but can cause serious illness in humans.
Echinococcus treatment details in the passport/certificate must include name, date, and time of treatment. Details must be endorsed by a veterinarian by signature and stamp.
Note - while treatment against ticks is no longer a compulsory requirement, travellers are advised, on animal and human health grounds, to avail of tick treatment for their dogs when getting the tapeworm treatment.
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