A ban on the sale of vapes to under 18s takes effect from the 22nd of December.
Penalties for breaking the new rules could include fines of up to €4,000 or six months in prison.
Other measures are due to follow next year, including action on e-cigarette sales in vending machines, and advertising.
Health Minister Wicklow TD Stephen Donnelly says the legislation is important.
'The Dream is Becoming a Reality' - Tánaiste Turns the Sod on Long-Awaited St Catherine’s Special School in Kilcoole
Wicklow Author Eilish Fisher Shortlisted for Prestigious Carnegie Medal
Packed Woodenbridge Meeting Demands Action on Arklow–Shillelagh Greenway
Ronan Russell Wins Arklow Children’s Christmas Story Competition
Wicklow Faces Rising Flood Risk As Recent Effects Of Storm Claudia Are Analysed