The Constitution of the State of Delaware was adopted on June 4, 1897. It is the fourth and current governing document for Delaware. It consists of a preamble and 17 articles.
The Delaware Constitution provides that the legislature has authority to amend it without a referendum. According to Article XVI, Section 1, of the Delaware Constitution, amendments to the Constitution may be proposed in the Senate or House of Representatives. If agreed by two-thirds of all the members elected to each House, the proposed amendment or amendments shall become part of the Constitution.
Full text of Delaware Constitution: http://delcode.delaware.gov/constitution/