A special district may issue special assessment bonds or notes to finance costs related to providing, improving, expanding, or enlarging improvements and facilities if the county legislative authority within which all or the major part of the special district is located authorizes the issuance of such bonds or notes. The decision of a county legislative authority authorizing or failing to authorize a proposed issue of special assessment bonds or notes constitutes a discretionary function, and shall not give rise to a cause of action against the county, county legislative authority, or any member of the county legislative authority.