Section 18 of theInterpretation Act 1984(WA) requires:

a.statutes to be interpreted using "aconstruction that would promote the purpose or object underlying the written law"

b.statutes to be interpreted using "aconstruction that is consistent with the ordinary meaning of the written law"

c.statutes to be interpreted using "aconstruction that would promote the interests of the state"

d.statutes to be interpreted using "aconstruction that would promote the literal meaning of the written law"