authoritative (esp. BrE), definitive
unanimous
adverse
favourable/favorable (esp. AmE)
controversial
important
preliminary
original
final
previous, recent
court, judicial, legal
federal

give, hand down, issue, make
overturn, reverse
The court overturned the original ruling.

uphold
base on sth
The judge's ruling is based on legal precedent.

follow
appeal

ruling against
the European Court's ruling against detention without trial

ruling by
the ruling by the High Court

ruling in favour/favor of
The newspaper said that this was a ruling in favour/favor of freedom of speech.

ruling on
The House will make a final ruling on the case next week.

Ruling is used with these nouns:
class, coalition, council, dynasty, elite, executive, junta, party, regime