There will be 211 polling stations in operation across county Mayo in the Referendum on the Eighth Amendment.
Voters on Mayo’s three islands are voting today, and the rest of the county cast their preference tomorrow (Friday).
Voters are being asked if they want the Eighth Amendment in the Constitution retained or repealed.
The Eighth Amendment reads "The State acknowledges the right to life of the unborn and, with due regard to the equal right to life of the mother, guarantees in its laws to respect, and, as far as practicable, by its laws to defend and vindicate that right."
This is the phrasing exactly as it appears in the constitution and there can be no changes made to it without a referendum.
County Registrar Fintan Murphy is in charge of operations in the Referendum in county Mayo.
He told Midwest News today that there is one polling station less in the county on this occasion than at the last Referendum, and the voters affected will be accommodated in Tourmakeady.