The Guarantors' Panel on the Constitutionality of Rules is the highest court of San Marino in matters of constitutional law. The institution was established with Constitutional Revising Law no. 36 of 26 February 2002, which has amended Article 16 of the "Declaration on the Citizens' Rights and Fundamental Principles of San Marino Constitutional Order". The Guarantors' Panel on the Constitutionality of Rules is the youngest body of San Marino constitutional order. Constitutionality review was previously entrusted to the Great and General Council, but throughout the years this solution had presented several limits.