On or before June 30 of each year, a district board shall adopt a preliminary budget which shall conform to the accounting and budgeting procedures for special districts contained in Subchapter 3 (commencing with Section 1031.1) of, and Article 1 (commencing with Section 1121) of Subchapter 4 of, Chapter 2 of Division 2 of Title 2 of the California Code of Regulations.