Each county shall be responsible for maintaining current information regarding its road log and, no later than May 1st of each year, shall submit an updated road log for its complete road system with all data elements as of December 31st of the preceding year. This annual update must be on computer-readable medium and written in the computer database application software format as prescribed by the county road administration board. All updates involving changes in control fields must include supporting documentation as required in WAC 136-60-050.