What is Massachusetts 1913 Law?

Legal Definition
Massachusetts General Laws Chapter 207, Section 11, more commonly known as the 1913 law, is a Massachusetts law enacted in 1913 and repealed in 2008 that invalidated the marriage of non-residents if the marriage was invalid in the state where they lived. It originated during a period of heightened antipathy to interracial marriage and went largely unenforced until used between 2004 and 2008 to deny marriage licenses to out-of-state same-sex couples.
-- Wikipedia