The Good Friday Agreement (April 1998) led to the formation of the Northern Ireland Executive (accountable to the Northern Ireland Assembly) on 2 December 1999, which ended 25 years of direct rule. The Executive was suspended several times due to political disputes (notably from October 2002 to May 2007) and each suspension resulted in the return of direct rule. Devolution was restored on 8 May 2007 and was partially interrupted in late 2015, due to the resignation of Democratic Unionist Party (DUP) ministers due to alleged Provisional IRA activity.