The first major revision to the tax code in more than 30 years has now been signed into law. (us.beyondbullsandbears.com)
[29] In 1985 the Thatcher government ratified the Single European Act — the first major revision to the Treaty of Rome — without a referendum. (en.wikipedia.org)
In February 2008 at the Geneva Salon, AM announced the first major revision of the DB9 since it was first seen late in 2003. (astonmartins.com)