From the conservative religion news and advocacy website Juicy Ecumenism, here is a report from reporter Alexander Griswold from the meeting:
At its 2014 General Assembly held in Detroit, the Presbyterian Church (U.S.A.) voted to approve two measures to allow ministers to perform same-sex marriages. The first, Item 10-03, issued an authoritative interpretation of the Book of Order stating that pastors have a right to preside over gay marriages in states where they are legal. The second, Item 10-02, amended the Book of Order to redefine marriage as between “two people” rather than between a man and a woman and allows ministers to perform any legal marriage between two people. That amendment will require the approval of a majority of the presbyteries before it will take effect.
For religion news watchers this vote was not unexpected. The delegates to the 201o General Assembly voted to permit the ordination of non-celibate gay and lesbian clergy, while the 2012 General Assembly narrowly turned down a similar gay marriage bill. The surprise was in the strong margin of support the measure received this time round.
Religion News Service observed:
The church has long grappled with the issue, which came to a head at the last General Assembly, in 2012, when a similar resolution allowing for gay marriage lost 338-308. Since then, the church’s decades-long decline in membership — it has lost 37 percent of its membership since 1992 — has continued. These losses have been led by conservative-leaning congregations that defected over what they lamented as the church’s embrace of more liberal values.
Those defections — many to smaller and more conservative Presbyterian denominations — made it more likely that the General Assembly would approve a gay marriage resolution this year.
One of these more conservative denominations is the Presbyterian Church in America (PCA) — the second largest Presbyterian denomination and one that withdrew from what is now the PCUSA in the early 1970s.