The National Council of State Legislatures (NCSL) is a bipartisan organization that serves the legislators and staffs of the states, commonwealths and territories of the United States. NCSL provides research, technical assistance and opportunities for policymakers to exchange ideas on the most pressing state issues
From Wikipedia
The National Conference of State Legislatures (NCSL), established in 1975, is a "nonpartisan public officials' association composed of sitting state legislators" from the states, territories and commonwealths of the United States.