Think of a rule that used to be normal and is not normal now: smoking indoors in a café, a phone ban that got tightened, a uniform rule that shifted. Laws do the same thing. They are made, they are enforced, and over time they change.

Once a law exists, somebody has to enforce it. Depending on the law, that can mean the Gardaí, a court, a local authority, or another body the Oireachtas has given powers to. Enforcement is what turns words on a page into something that actually shapes a day.

Quick-fire: Who would enforce a workplace smoking ban? Who would enforce ordinary road traffic rules? Call out answers.

Laws also evolve. In Ireland there are three main routes (get these headings on the board now):

1. A new Act of the Oireachtas: TDs and Senators pass fresh legislation that replaces, amends or repeals an older rule. This is the everyday route for most changes.
2. A court decision: a court interprets what a law means, or finds that a law conflicts with the Constitution. That decision changes how the law works for everyone, not only the people in the case.
3. A referendum: when the change touches the Constitution, the people vote. An ordinary Act alone is not enough; the Constitution has to be amended first.

One-sentence classify: "Ireland wants to tighten an ordinary workplace health rule that is not written into the Constitution." Which of the three routes? Agree an answer with a neighbour, then check with the room before you meet the cards.

Part 1 (8 minutes hard stop)

Work in pairs. Your teacher models one route-justification sentence, then starts a visible timer. Read the three law cards. For each card, agree:

• what the law was like before
• what changed
• which of the three routes it took
• what forced the change

Card A: Smoking at work

For years, smoking indoors at work, including in pubs and restaurants, was ordinary. In the early 2000s the Oireachtas passed tobacco control legislation. From March 2004, smoking was banned in most workplaces across Ireland. People who broke the ban could be challenged under that legislation. The change did not need a vote of the whole people, because it did not rewrite the Constitution.

Card B: Marriage equality

Before 2015, Irish law and the Constitution did not provide for marriage between two people of the same sex. Changing that meant changing the Constitution, so an ordinary Act was not enough on its own. In May 2015 Ireland held a referendum. A majority voted yes. The Constitution was amended, and the law then followed that change.

Card C: When a court changes how a law applies

An existing Act of the Oireachtas was being applied in a way that limited a constitutional right. A case went to the superior courts. The Supreme Court held that this application of the Act conflicted with the Constitution. From that decision on, the law had to be applied differently for everyone, not only the people in the case. No referendum was needed, and the Oireachtas did not have to pass a fresh Act first for that change in application to take effect.

Part 2 (about 9 minutes, including a short share)

Still in pairs, name one real law that touches life for people your age (or a school rule only if you can name the wider statute behind it). Use one of these starters if you need one:

• voting age
• phone use while crossing the road
• school search rules backed by law
• single-use plastics rules
• online age gates

For your choice, agree only:

• which of the three routes it would almost certainly need, and why
• the strongest reason somebody might give for leaving it as it is

Look back at the three routes on the board.

On paper, finish this in two short sentences:
If the law I care about is going to change, it would most likely take the ___ route, because ___.

Then talk with a neighbour: did anyone near you pick the same law but a different route? What would settle which of you is right?

You can now explain who enforces a law once it exists, and name the three main routes by which Irish law evolves: a new Act of the Oireachtas, a court decision, and a referendum when the Constitution is involved. You practised matching real changes to the right route, and you can say which route a change you care about would need and why.