(1) In order that all state publications of the commonwealth are preserved and made available for the use of citizens of the state, the state library is hereby designated as the depository library for Massachusetts state publications.
(2) The state library shall maintain a complete collection of Massachusetts state publications, both current and historic.
(3) A depository library system, providing for the distribution of state documents to the Library of Congress and to each of the regional public libraries in the state shall be established and maintained by the state library.