As used in this article:

(a) “Disaster” means any occurrence of fire, flood, storm, earthquake, explosion, epidemic, riot, sabotage or other condition of extreme peril resulting in substantial damage or injury to persons or property within this state, whether such occurrence is caused by an act of God, nature or man, including an enemy of the United States.

(b) “Record” means document, book, paper, photograph, sound recording or other material, regardless of physical form or characteristics, made or received pursuant to law or ordinance or in connection with the transaction of official business. Library and museum material made or acquired and preserved solely for reference or exhibition purposes, extra copies of documents preserved only for convenience of reference, and stocks of publications and of processed documents are not included within the definition of records as used in this article.

(c) “State record” means:

(1) A record of a department, office, commission, board or other agency, however designated, of the state government.

(2) A record of the State Legislature.

(3) A record of any court of record, whether of statewide or local jurisdiction.

(4) Any record designated or treated as a state record under state law.

(d) “Local record” means a record of a county, city, town, authority or any public corporation or political entity whether organized and existing under charter or under general law unless the record is designated or treated as a state record under state law.

(e) “Agency” means any department, office, commission, board or other unit, however designated, of the executive branch of state government.

(f) “Preservation duplicate” means a copy of an essential state record which is used for the purpose of preserving such state record pursuant to this article.