I understand that the person concerned is a non-EEA national and, therefore, subject to the provisions of the Immigration Act, 2004 that deal with entry to the State. The person is required, on arrival, to present to an immigration officer for permission to enter and be in the State.
In deciding whether to grant permission to enter the State, the immigration officer will take all relevant factors into account with the principal ones being: the purpose of the visit or stay, the duration of stay, the ability of the individual to support themselves during their stay, and proof that the person will exit the country on or before the expiry of any permission given. A person's previous immigration record may, if relevant, also be taken into account. Each application for entry to the State is assessed on its own merits. The Immigration Act 2004 sets out in section 3(4) the grounds on which an individual may be refused leave to enter the State.